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  <url>
    <loc>https://it.etudes.ru/imath/</loc>
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  <url>
    <loc>https://it.etudes.ru/about/</loc>
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  <url>
    <loc>https://it.etudes.ru/etudes/windscreen-wiper/</loc>
    <lastmod>2010-11-15</lastmod>
    <image:image>
      <image:loc>https://it.etudes.ru/.data/etudes/windscreen-wiper/01@fhd.jpg</image:loc>
      <image:title><![CDATA[Meccanismi a cerniere]]></image:title>
    </image:image>
    <image:image>
      <image:loc>https://it.etudes.ru/.data/etudes/windscreen-wiper/01@hd.jpg</image:loc>
      <image:title><![CDATA[Meccanismi a cerniere]]></image:title>
    </image:image>
    <image:image>
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      <image:title><![CDATA[Meccanismi a cerniere]]></image:title>
    </image:image>
    <image:image>
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      <image:title><![CDATA[Meccanismi a cerniere]]></image:title>
    </image:image>
    <image:image>
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      <image:title><![CDATA[Meccanismi a cerniere]]></image:title>
    </image:image>
    <image:image>
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      <image:title><![CDATA[Meccanismi a cerniere]]></image:title>
    </image:image>
    <image:image>
      <image:loc>https://it.etudes.ru/.data/etudes/windscreen-wiper/03@fhd.jpg</image:loc>
      <image:title><![CDATA[Meccanismi a cerniere]]></image:title>
    </image:image>
    <image:image>
      <image:loc>https://it.etudes.ru/.data/etudes/windscreen-wiper/03@hd.jpg</image:loc>
      <image:title><![CDATA[Meccanismi a cerniere]]></image:title>
    </image:image>
    <image:image>
      <image:loc>https://it.etudes.ru/.data/etudes/windscreen-wiper/03.jpg</image:loc>
      <image:title><![CDATA[Meccanismi a cerniere]]></image:title>
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      <video:title><![CDATA[Meccanismi a cerniere]]></video:title>
      <video:description><![CDATA[Tutti hanno visto come i tergicristalli del vetro anteriore dell’auto spazzano via velocemente l’acqua. Se mostrate a un meccanico il meccanismo di questo sistema, vi dirà che  non può funzionare!]]></video:description>
      <video:duration>377</video:duration>
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    <loc>https://it.etudes.ru/etudes/napkin-folding-problem/</loc>
    <lastmod>2010-11-11</lastmod>
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      <image:loc>https://it.etudes.ru/.data/etudes/napkin-folding-problem/01@fhd.jpg</image:loc>
      <image:title><![CDATA[Il rublo ripiegato]]></image:title>
    </image:image>
    <image:image>
      <image:loc>https://it.etudes.ru/.data/etudes/napkin-folding-problem/01@hd.jpg</image:loc>
      <image:title><![CDATA[Il rublo ripiegato]]></image:title>
    </image:image>
    <image:image>
      <image:loc>https://it.etudes.ru/.data/etudes/napkin-folding-problem/01.jpg</image:loc>
      <image:title><![CDATA[Il rublo ripiegato]]></image:title>
    </image:image>
    <image:image>
      <image:loc>https://it.etudes.ru/.data/etudes/napkin-folding-problem/02@fhd.jpg</image:loc>
      <image:title><![CDATA[Il rublo ripiegato]]></image:title>
    </image:image>
    <image:image>
      <image:loc>https://it.etudes.ru/.data/etudes/napkin-folding-problem/02@hd.jpg</image:loc>
      <image:title><![CDATA[Il rublo ripiegato]]></image:title>
    </image:image>
    <image:image>
      <image:loc>https://it.etudes.ru/.data/etudes/napkin-folding-problem/02.jpg</image:loc>
      <image:title><![CDATA[Il rublo ripiegato]]></image:title>
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    <image:image>
      <image:loc>https://it.etudes.ru/.data/etudes/napkin-folding-problem/03@fhd.jpg</image:loc>
      <image:title><![CDATA[Il rublo ripiegato]]></image:title>
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    <image:image>
      <image:loc>https://it.etudes.ru/.data/etudes/napkin-folding-problem/03@hd.jpg</image:loc>
      <image:title><![CDATA[Il rublo ripiegato]]></image:title>
    </image:image>
    <image:image>
      <image:loc>https://it.etudes.ru/.data/etudes/napkin-folding-problem/03.jpg</image:loc>
      <image:title><![CDATA[Il rublo ripiegato]]></image:title>
    </image:image>
    <image:image>
      <image:loc>https://it.etudes.ru/.data/etudes/napkin-folding-problem/04@fhd.jpg</image:loc>
      <image:title><![CDATA[Il rublo ripiegato]]></image:title>
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    <image:image>
      <image:loc>https://it.etudes.ru/.data/etudes/napkin-folding-problem/04@hd.jpg</image:loc>
      <image:title><![CDATA[Il rublo ripiegato]]></image:title>
    </image:image>
    <image:image>
      <image:loc>https://it.etudes.ru/.data/etudes/napkin-folding-problem/04.jpg</image:loc>
      <image:title><![CDATA[Il rublo ripiegato]]></image:title>
    </image:image>
    <image:image>
      <image:loc>https://it.etudes.ru/.data/etudes/napkin-folding-problem/05@fhd.jpg</image:loc>
      <image:title><![CDATA[Il rublo ripiegato]]></image:title>
    </image:image>
    <image:image>
      <image:loc>https://it.etudes.ru/.data/etudes/napkin-folding-problem/05@hd.jpg</image:loc>
      <image:title><![CDATA[Il rublo ripiegato]]></image:title>
    </image:image>
    <image:image>
      <image:loc>https://it.etudes.ru/.data/etudes/napkin-folding-problem/05.jpg</image:loc>
      <image:title><![CDATA[Il rublo ripiegato]]></image:title>
    </image:image>
    <image:image>
      <image:loc>https://it.etudes.ru/.data/etudes/napkin-folding-problem/06@fhd.jpg</image:loc>
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    <image:image>
      <image:loc>https://it.etudes.ru/.data/etudes/napkin-folding-problem/06@hd.jpg</image:loc>
      <image:title><![CDATA[Il rublo ripiegato]]></image:title>
    </image:image>
    <image:image>
      <image:loc>https://it.etudes.ru/.data/etudes/napkin-folding-problem/06.jpg</image:loc>
      <image:title><![CDATA[Il rublo ripiegato]]></image:title>
    </image:image>
    <image:image>
      <image:loc>https://it.etudes.ru/.data/etudes/napkin-folding-problem/07@fhd.jpg</image:loc>
      <image:title><![CDATA[Il rublo ripiegato]]></image:title>
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    <image:image>
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    <image:image>
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    <image:image>
      <image:loc>https://it.etudes.ru/.data/etudes/napkin-folding-problem/08@fhd.jpg</image:loc>
      <image:title><![CDATA[Il rublo ripiegato]]></image:title>
    </image:image>
    <image:image>
      <image:loc>https://it.etudes.ru/.data/etudes/napkin-folding-problem/08@hd.jpg</image:loc>
      <image:title><![CDATA[Il rublo ripiegato]]></image:title>
    </image:image>
    <image:image>
      <image:loc>https://it.etudes.ru/.data/etudes/napkin-folding-problem/08.jpg</image:loc>
      <image:title><![CDATA[Il rublo ripiegato]]></image:title>
    </image:image>
    <image:image>
      <image:loc>https://it.etudes.ru/.data/etudes/napkin-folding-problem/09@fhd.jpg</image:loc>
      <image:title><![CDATA[Il rublo ripiegato]]></image:title>
    </image:image>
    <image:image>
      <image:loc>https://it.etudes.ru/.data/etudes/napkin-folding-problem/09@hd.jpg</image:loc>
      <image:title><![CDATA[Il rublo ripiegato]]></image:title>
    </image:image>
    <image:image>
      <image:loc>https://it.etudes.ru/.data/etudes/napkin-folding-problem/09.jpg</image:loc>
      <image:title><![CDATA[Il rublo ripiegato]]></image:title>
    </image:image>
    <image:image>
      <image:loc>https://it.etudes.ru/.data/etudes/napkin-folding-problem/10@fhd.jpg</image:loc>
      <image:title><![CDATA[Il rublo ripiegato]]></image:title>
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    <image:image>
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    <image:image>
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    <image:image>
      <image:loc>https://it.etudes.ru/.data/etudes/napkin-folding-problem/11@fhd.jpg</image:loc>
      <image:title><![CDATA[Il rublo ripiegato]]></image:title>
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    <image:image>
      <image:loc>https://it.etudes.ru/.data/etudes/napkin-folding-problem/11@hd.jpg</image:loc>
      <image:title><![CDATA[Il rublo ripiegato]]></image:title>
    </image:image>
    <image:image>
      <image:loc>https://it.etudes.ru/.data/etudes/napkin-folding-problem/11.jpg</image:loc>
      <image:title><![CDATA[Il rublo ripiegato]]></image:title>
    </image:image>
    <image:image>
      <image:loc>https://it.etudes.ru/.data/etudes/napkin-folding-problem/12@fhd.jpg</image:loc>
      <image:title><![CDATA[Il rublo ripiegato]]></image:title>
    </image:image>
    <image:image>
      <image:loc>https://it.etudes.ru/.data/etudes/napkin-folding-problem/12@hd.jpg</image:loc>
      <image:title><![CDATA[Il rublo ripiegato]]></image:title>
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    <image:image>
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      <image:title><![CDATA[Il rublo ripiegato]]></image:title>
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    <image:image>
      <image:loc>https://it.etudes.ru/.data/etudes/napkin-folding-problem/13@fhd.jpg</image:loc>
      <image:title><![CDATA[Il rublo ripiegato]]></image:title>
    </image:image>
    <image:image>
      <image:loc>https://it.etudes.ru/.data/etudes/napkin-folding-problem/13@hd.jpg</image:loc>
      <image:title><![CDATA[Il rublo ripiegato]]></image:title>
    </image:image>
    <image:image>
      <image:loc>https://it.etudes.ru/.data/etudes/napkin-folding-problem/13.jpg</image:loc>
      <image:title><![CDATA[Il rublo ripiegato]]></image:title>
    </image:image>
    <image:image>
      <image:loc>https://it.etudes.ru/.data/etudes/napkin-folding-problem/14@fhd.jpg</image:loc>
      <image:title><![CDATA[Il rublo ripiegato]]></image:title>
    </image:image>
    <image:image>
      <image:loc>https://it.etudes.ru/.data/etudes/napkin-folding-problem/14@hd.jpg</image:loc>
      <image:title><![CDATA[Il rublo ripiegato]]></image:title>
    </image:image>
    <image:image>
      <image:loc>https://it.etudes.ru/.data/etudes/napkin-folding-problem/14.jpg</image:loc>
      <image:title><![CDATA[Il rublo ripiegato]]></image:title>
    </image:image>
    <image:image>
      <image:loc>https://it.etudes.ru/.data/etudes/napkin-folding-problem/15@fhd.jpg</image:loc>
      <image:title><![CDATA[Il rublo ripiegato]]></image:title>
    </image:image>
    <image:image>
      <image:loc>https://it.etudes.ru/.data/etudes/napkin-folding-problem/15@hd.jpg</image:loc>
      <image:title><![CDATA[Il rublo ripiegato]]></image:title>
    </image:image>
    <image:image>
      <image:loc>https://it.etudes.ru/.data/etudes/napkin-folding-problem/15.jpg</image:loc>
      <image:title><![CDATA[Il rublo ripiegato]]></image:title>
    </image:image>
    <image:image>
      <image:loc>https://it.etudes.ru/.data/etudes/napkin-folding-problem/16@fhd.jpg</image:loc>
      <image:title><![CDATA[Il rublo ripiegato]]></image:title>
    </image:image>
    <image:image>
      <image:loc>https://it.etudes.ru/.data/etudes/napkin-folding-problem/16@hd.jpg</image:loc>
      <image:title><![CDATA[Il rublo ripiegato]]></image:title>
    </image:image>
    <image:image>
      <image:loc>https://it.etudes.ru/.data/etudes/napkin-folding-problem/16.jpg</image:loc>
      <image:title><![CDATA[Il rublo ripiegato]]></image:title>
    </image:image>
    <image:image>
      <image:loc>https://it.etudes.ru/.data/etudes/napkin-folding-problem/17@fhd.jpg</image:loc>
      <image:title><![CDATA[Il rublo ripiegato]]></image:title>
    </image:image>
    <image:image>
      <image:loc>https://it.etudes.ru/.data/etudes/napkin-folding-problem/17@hd.jpg</image:loc>
      <image:title><![CDATA[Il rublo ripiegato]]></image:title>
    </image:image>
    <image:image>
      <image:loc>https://it.etudes.ru/.data/etudes/napkin-folding-problem/17.jpg</image:loc>
      <image:title><![CDATA[Il rublo ripiegato]]></image:title>
    </image:image>
    <image:image>
      <image:loc>https://it.etudes.ru/.data/etudes/napkin-folding-problem/18@fhd.jpg</image:loc>
      <image:title><![CDATA[Il rublo ripiegato]]></image:title>
    </image:image>
    <image:image>
      <image:loc>https://it.etudes.ru/.data/etudes/napkin-folding-problem/18@hd.jpg</image:loc>
      <image:title><![CDATA[Il rublo ripiegato]]></image:title>
    </image:image>
    <image:image>
      <image:loc>https://it.etudes.ru/.data/etudes/napkin-folding-problem/18.jpg</image:loc>
      <image:title><![CDATA[Il rublo ripiegato]]></image:title>
    </image:image>
    <image:image>
      <image:loc>https://it.etudes.ru/.data/etudes/napkin-folding-problem/19@fhd.jpg</image:loc>
      <image:title><![CDATA[Il rublo ripiegato]]></image:title>
    </image:image>
    <image:image>
      <image:loc>https://it.etudes.ru/.data/etudes/napkin-folding-problem/19@hd.jpg</image:loc>
      <image:title><![CDATA[Il rublo ripiegato]]></image:title>
    </image:image>
    <image:image>
      <image:loc>https://it.etudes.ru/.data/etudes/napkin-folding-problem/19.jpg</image:loc>
      <image:title><![CDATA[Il rublo ripiegato]]></image:title>
    </image:image>
    <video:video>
      <video:content_loc>https://it.etudes.ru/.data/video/EtudesRu_napkin-folding-problem@fhd.mp4</video:content_loc>
      <video:thumbnail_loc>https://it.etudes.ru/.data/etudes/napkin-folding-problem/thumb@fhd.jpg</video:thumbnail_loc>
      <video:title><![CDATA[Il rublo ripiegato]]></video:title>
      <video:description><![CDATA[E’ possibile ripiegare un foglio rettangolare di carta (una banconota da un rublo) in modo da ottenere un poligono planare, il cui perimetro supera il perimetro del foglio originale?]]></video:description>
      <video:duration>377</video:duration>
    </video:video>
  </url>
  <url>
    <loc>https://it.etudes.ru/etudes/ham-sandwich-theorem/</loc>
    <lastmod>2010-09-03</lastmod>
    <image:image>
      <image:loc>https://it.etudes.ru/.data/etudes/ham-sandwich-theorem/01@fhd.jpg</image:loc>
      <image:title><![CDATA[Il problema del sandwich]]></image:title>
    </image:image>
    <image:image>
      <image:loc>https://it.etudes.ru/.data/etudes/ham-sandwich-theorem/01@hd.jpg</image:loc>
      <image:title><![CDATA[Il problema del sandwich]]></image:title>
    </image:image>
    <image:image>
      <image:loc>https://it.etudes.ru/.data/etudes/ham-sandwich-theorem/01.jpg</image:loc>
      <image:title><![CDATA[Il problema del sandwich]]></image:title>
    </image:image>
    <image:image>
      <image:loc>https://it.etudes.ru/.data/etudes/ham-sandwich-theorem/02@fhd.jpg</image:loc>
      <image:title><![CDATA[Il problema del sandwich]]></image:title>
    </image:image>
    <image:image>
      <image:loc>https://it.etudes.ru/.data/etudes/ham-sandwich-theorem/02@hd.jpg</image:loc>
      <image:title><![CDATA[Il problema del sandwich]]></image:title>
    </image:image>
    <image:image>
      <image:loc>https://it.etudes.ru/.data/etudes/ham-sandwich-theorem/02.jpg</image:loc>
      <image:title><![CDATA[Il problema del sandwich]]></image:title>
    </image:image>
    <image:image>
      <image:loc>https://it.etudes.ru/.data/etudes/ham-sandwich-theorem/03@fhd.jpg</image:loc>
      <image:title><![CDATA[Il problema del sandwich]]></image:title>
    </image:image>
    <image:image>
      <image:loc>https://it.etudes.ru/.data/etudes/ham-sandwich-theorem/03@hd.jpg</image:loc>
      <image:title><![CDATA[Il problema del sandwich]]></image:title>
    </image:image>
    <image:image>
      <image:loc>https://it.etudes.ru/.data/etudes/ham-sandwich-theorem/03.jpg</image:loc>
      <image:title><![CDATA[Il problema del sandwich]]></image:title>
    </image:image>
    <image:image>
      <image:loc>https://it.etudes.ru/.data/etudes/ham-sandwich-theorem/04@fhd.jpg</image:loc>
      <image:title><![CDATA[Il problema del sandwich]]></image:title>
    </image:image>
    <image:image>
      <image:loc>https://it.etudes.ru/.data/etudes/ham-sandwich-theorem/04@hd.jpg</image:loc>
      <image:title><![CDATA[Il problema del sandwich]]></image:title>
    </image:image>
    <image:image>
      <image:loc>https://it.etudes.ru/.data/etudes/ham-sandwich-theorem/04.jpg</image:loc>
      <image:title><![CDATA[Il problema del sandwich]]></image:title>
    </image:image>
    <image:image>
      <image:loc>https://it.etudes.ru/.data/etudes/ham-sandwich-theorem/05@fhd.jpg</image:loc>
      <image:title><![CDATA[Il problema del sandwich]]></image:title>
    </image:image>
    <image:image>
      <image:loc>https://it.etudes.ru/.data/etudes/ham-sandwich-theorem/05@hd.jpg</image:loc>
      <image:title><![CDATA[Il problema del sandwich]]></image:title>
    </image:image>
    <image:image>
      <image:loc>https://it.etudes.ru/.data/etudes/ham-sandwich-theorem/05.jpg</image:loc>
      <image:title><![CDATA[Il problema del sandwich]]></image:title>
    </image:image>
    <image:image>
      <image:loc>https://it.etudes.ru/.data/etudes/ham-sandwich-theorem/06@fhd.jpg</image:loc>
      <image:title><![CDATA[Il problema del sandwich]]></image:title>
    </image:image>
    <image:image>
      <image:loc>https://it.etudes.ru/.data/etudes/ham-sandwich-theorem/06@hd.jpg</image:loc>
      <image:title><![CDATA[Il problema del sandwich]]></image:title>
    </image:image>
    <image:image>
      <image:loc>https://it.etudes.ru/.data/etudes/ham-sandwich-theorem/06.jpg</image:loc>
      <image:title><![CDATA[Il problema del sandwich]]></image:title>
    </image:image>
    <image:image>
      <image:loc>https://it.etudes.ru/.data/etudes/ham-sandwich-theorem/07@fhd.jpg</image:loc>
      <image:title><![CDATA[Il problema del sandwich]]></image:title>
    </image:image>
    <image:image>
      <image:loc>https://it.etudes.ru/.data/etudes/ham-sandwich-theorem/07@hd.jpg</image:loc>
      <image:title><![CDATA[Il problema del sandwich]]></image:title>
    </image:image>
    <image:image>
      <image:loc>https://it.etudes.ru/.data/etudes/ham-sandwich-theorem/07.jpg</image:loc>
      <image:title><![CDATA[Il problema del sandwich]]></image:title>
    </image:image>
    <image:image>
      <image:loc>https://it.etudes.ru/.data/etudes/ham-sandwich-theorem/08@fhd.jpg</image:loc>
      <image:title><![CDATA[Il problema del sandwich]]></image:title>
    </image:image>
    <image:image>
      <image:loc>https://it.etudes.ru/.data/etudes/ham-sandwich-theorem/08@hd.jpg</image:loc>
      <image:title><![CDATA[Il problema del sandwich]]></image:title>
    </image:image>
    <image:image>
      <image:loc>https://it.etudes.ru/.data/etudes/ham-sandwich-theorem/08.jpg</image:loc>
      <image:title><![CDATA[Il problema del sandwich]]></image:title>
    </image:image>
    <image:image>
      <image:loc>https://it.etudes.ru/.data/etudes/ham-sandwich-theorem/09@fhd.jpg</image:loc>
      <image:title><![CDATA[Il problema del sandwich]]></image:title>
    </image:image>
    <image:image>
      <image:loc>https://it.etudes.ru/.data/etudes/ham-sandwich-theorem/09@hd.jpg</image:loc>
      <image:title><![CDATA[Il problema del sandwich]]></image:title>
    </image:image>
    <image:image>
      <image:loc>https://it.etudes.ru/.data/etudes/ham-sandwich-theorem/09.jpg</image:loc>
      <image:title><![CDATA[Il problema del sandwich]]></image:title>
    </image:image>
    <image:image>
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    <image:image>
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    </image:image>
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    </image:image>
    <image:image>
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    <image:image>
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    </image:image>
    <image:image>
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    </image:image>
    <image:image>
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    </image:image>
    <image:image>
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    </image:image>
    <image:image>
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    </image:image>
    <image:image>
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    </image:image>
    <image:image>
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    </image:image>
    <image:image>
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    </image:image>
    <image:image>
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    </image:image>
    <image:image>
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    </image:image>
    <image:image>
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      <image:title><![CDATA[Il problema del sandwich]]></image:title>
    </image:image>
    <image:image>
      <image:loc>https://it.etudes.ru/.data/etudes/ham-sandwich-theorem/16@fhd.jpg</image:loc>
      <image:title><![CDATA[Il problema del sandwich]]></image:title>
    </image:image>
    <image:image>
      <image:loc>https://it.etudes.ru/.data/etudes/ham-sandwich-theorem/16@hd.jpg</image:loc>
      <image:title><![CDATA[Il problema del sandwich]]></image:title>
    </image:image>
    <image:image>
      <image:loc>https://it.etudes.ru/.data/etudes/ham-sandwich-theorem/16.jpg</image:loc>
      <image:title><![CDATA[Il problema del sandwich]]></image:title>
    </image:image>
    <video:video>
      <video:content_loc>https://it.etudes.ru/.data/video/EtudesRu_ham-sandwich-theorem@fhd.mp4</video:content_loc>
      <video:thumbnail_loc>https://it.etudes.ru/.data/etudes/ham-sandwich-theorem/thumb@fhd.jpg</video:thumbnail_loc>
      <video:title><![CDATA[Il problema del sandwich]]></video:title>
      <video:description><![CDATA[Si può tagliare attraverso una sezione planare  un sandwich composto da una fetta di pane, una di formaggio e una di prosciutto in modo che le due parti contengano le stesse quantità di pane, formaggio e prosciutto?]]></video:description>
      <video:duration>377</video:duration>
    </video:video>
  </url>
  <url>
    <loc>https://it.etudes.ru/etudes/continuity/</loc>
    <lastmod>2010-09-01</lastmod>
    <image:image>
      <image:loc>https://it.etudes.ru/.data/etudes/continuity/01@fhd.jpg</image:loc>
      <image:title><![CDATA[Continuità]]></image:title>
    </image:image>
    <image:image>
      <image:loc>https://it.etudes.ru/.data/etudes/continuity/01@hd.jpg</image:loc>
      <image:title><![CDATA[Continuità]]></image:title>
    </image:image>
    <image:image>
      <image:loc>https://it.etudes.ru/.data/etudes/continuity/01.jpg</image:loc>
      <image:title><![CDATA[Continuità]]></image:title>
    </image:image>
    <image:image>
      <image:loc>https://it.etudes.ru/.data/etudes/continuity/02@fhd.jpg</image:loc>
      <image:title><![CDATA[Continuità]]></image:title>
    </image:image>
    <image:image>
      <image:loc>https://it.etudes.ru/.data/etudes/continuity/02@hd.jpg</image:loc>
      <image:title><![CDATA[Continuità]]></image:title>
    </image:image>
    <image:image>
      <image:loc>https://it.etudes.ru/.data/etudes/continuity/02.jpg</image:loc>
      <image:title><![CDATA[Continuità]]></image:title>
    </image:image>
    <image:image>
      <image:loc>https://it.etudes.ru/.data/etudes/continuity/03@fhd.jpg</image:loc>
      <image:title><![CDATA[Continuità]]></image:title>
    </image:image>
    <image:image>
      <image:loc>https://it.etudes.ru/.data/etudes/continuity/03@hd.jpg</image:loc>
      <image:title><![CDATA[Continuità]]></image:title>
    </image:image>
    <image:image>
      <image:loc>https://it.etudes.ru/.data/etudes/continuity/03.jpg</image:loc>
      <image:title><![CDATA[Continuità]]></image:title>
    </image:image>
    <video:video>
      <video:content_loc>https://it.etudes.ru/.data/video/EtudesRu_continuity@fhd.mp4</video:content_loc>
      <video:thumbnail_loc>https://it.etudes.ru/.data/etudes/continuity/thumb@fhd.jpg</video:thumbnail_loc>
      <video:title><![CDATA[Continuità]]></video:title>
      <video:description><![CDATA[La nostra osservazione del mondo, basata fin dall’infanzia sul concetto di continuità, risulta essere uno strumento potente usato nella dimostrazione di alcune proposizioni matematiche.]]></video:description>
      <video:duration>377</video:duration>
    </video:video>
  </url>
  <url>
    <loc>https://it.etudes.ru/etudes/vernier/</loc>
    <lastmod>2010-02-25</lastmod>
    <image:image>
      <image:loc>https://it.etudes.ru/.data/etudes/vernier/01@fhd.jpg</image:loc>
      <image:title><![CDATA[Il nonio (verniero)]]></image:title>
    </image:image>
    <image:image>
      <image:loc>https://it.etudes.ru/.data/etudes/vernier/01@hd.jpg</image:loc>
      <image:title><![CDATA[Il nonio (verniero)]]></image:title>
    </image:image>
    <image:image>
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      <image:title><![CDATA[Il nonio (verniero)]]></image:title>
    </image:image>
    <image:image>
      <image:loc>https://it.etudes.ru/.data/etudes/vernier/02@fhd.jpg</image:loc>
      <image:title><![CDATA[Il nonio (verniero)]]></image:title>
    </image:image>
    <image:image>
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      <image:title><![CDATA[Il nonio (verniero)]]></image:title>
    </image:image>
    <image:image>
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      <image:title><![CDATA[Il nonio (verniero)]]></image:title>
    </image:image>
    <image:image>
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      <image:title><![CDATA[Il nonio (verniero)]]></image:title>
    </image:image>
    <image:image>
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      <image:title><![CDATA[Il nonio (verniero)]]></image:title>
    </image:image>
    <image:image>
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      <image:title><![CDATA[Il nonio (verniero)]]></image:title>
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    <image:image>
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      <video:thumbnail_loc>https://it.etudes.ru/.data/etudes/vernier/thumb@fhd.jpg</video:thumbnail_loc>
      <video:title><![CDATA[Il nonio (verniero)]]></video:title>
      <video:description><![CDATA[Vi mostriamo come una scala supplementare permette di aumentare la precisione nelle misure.]]></video:description>
      <video:duration>377</video:duration>
    </video:video>
  </url>
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    <loc>https://it.etudes.ru/etudes/pick-theorem/</loc>
    <lastmod>2010-01-25</lastmod>
  </url>
  <url>
    <loc>https://it.etudes.ru/etudes/pythagorean-theorem/</loc>
    <lastmod>2009-12-25</lastmod>
  </url>
  <url>
    <loc>https://it.etudes.ru/etudes/wheel-inventing/</loc>
    <lastmod>2009-10-09</lastmod>
    <image:image>
      <image:loc>https://it.etudes.ru/.data/etudes/wheel-inventing/01@fhd.jpg</image:loc>
      <image:title><![CDATA[Inventare la ruota]]></image:title>
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      <image:title><![CDATA[Inventare la ruota]]></image:title>
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      <image:title><![CDATA[Inventare la ruota]]></image:title>
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    <image:image>
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    <image:image>
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      <image:title><![CDATA[Inventare la ruota]]></image:title>
    </image:image>
    <image:image>
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      <image:title><![CDATA[Inventare la ruota]]></image:title>
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    <image:image>
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      <image:title><![CDATA[Inventare la ruota]]></image:title>
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    <image:image>
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      <image:title><![CDATA[Inventare la ruota]]></image:title>
    </image:image>
    <image:image>
      <image:loc>https://it.etudes.ru/.data/etudes/wheel-inventing/03.jpg</image:loc>
      <image:title><![CDATA[Inventare la ruota]]></image:title>
    </image:image>
    <image:image>
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      <image:title><![CDATA[Inventare la ruota]]></image:title>
    </image:image>
    <image:image>
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      <image:title><![CDATA[Inventare la ruota]]></image:title>
    </image:image>
    <image:image>
      <image:loc>https://it.etudes.ru/.data/etudes/wheel-inventing/04.jpg</image:loc>
      <image:title><![CDATA[Inventare la ruota]]></image:title>
    </image:image>
    <image:image>
      <image:loc>https://it.etudes.ru/.data/etudes/wheel-inventing/05@fhd.jpg</image:loc>
      <image:title><![CDATA[Inventare la ruota]]></image:title>
    </image:image>
    <image:image>
      <image:loc>https://it.etudes.ru/.data/etudes/wheel-inventing/05@hd.jpg</image:loc>
      <image:title><![CDATA[Inventare la ruota]]></image:title>
    </image:image>
    <image:image>
      <image:loc>https://it.etudes.ru/.data/etudes/wheel-inventing/05.jpg</image:loc>
      <image:title><![CDATA[Inventare la ruota]]></image:title>
    </image:image>
    <image:image>
      <image:loc>https://it.etudes.ru/.data/etudes/wheel-inventing/06@fhd.jpg</image:loc>
      <image:title><![CDATA[Inventare la ruota]]></image:title>
    </image:image>
    <image:image>
      <image:loc>https://it.etudes.ru/.data/etudes/wheel-inventing/06@hd.jpg</image:loc>
      <image:title><![CDATA[Inventare la ruota]]></image:title>
    </image:image>
    <image:image>
      <image:loc>https://it.etudes.ru/.data/etudes/wheel-inventing/06.jpg</image:loc>
      <image:title><![CDATA[Inventare la ruota]]></image:title>
    </image:image>
    <image:image>
      <image:loc>https://it.etudes.ru/.data/etudes/wheel-inventing/07@fhd.jpg</image:loc>
      <image:title><![CDATA[Inventare la ruota]]></image:title>
    </image:image>
    <image:image>
      <image:loc>https://it.etudes.ru/.data/etudes/wheel-inventing/07@hd.jpg</image:loc>
      <image:title><![CDATA[Inventare la ruota]]></image:title>
    </image:image>
    <image:image>
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      <image:title><![CDATA[Inventare la ruota]]></image:title>
    </image:image>
    <image:image>
      <image:loc>https://it.etudes.ru/.data/etudes/wheel-inventing/08@fhd.jpg</image:loc>
      <image:title><![CDATA[Inventare la ruota]]></image:title>
    </image:image>
    <image:image>
      <image:loc>https://it.etudes.ru/.data/etudes/wheel-inventing/08@hd.jpg</image:loc>
      <image:title><![CDATA[Inventare la ruota]]></image:title>
    </image:image>
    <image:image>
      <image:loc>https://it.etudes.ru/.data/etudes/wheel-inventing/08.jpg</image:loc>
      <image:title><![CDATA[Inventare la ruota]]></image:title>
    </image:image>
    <image:image>
      <image:loc>https://it.etudes.ru/.data/etudes/wheel-inventing/09@fhd.jpg</image:loc>
      <image:title><![CDATA[Inventare la ruota]]></image:title>
    </image:image>
    <image:image>
      <image:loc>https://it.etudes.ru/.data/etudes/wheel-inventing/09@hd.jpg</image:loc>
      <image:title><![CDATA[Inventare la ruota]]></image:title>
    </image:image>
    <image:image>
      <image:loc>https://it.etudes.ru/.data/etudes/wheel-inventing/09.jpg</image:loc>
      <image:title><![CDATA[Inventare la ruota]]></image:title>
    </image:image>
    <video:video>
      <video:content_loc>https://it.etudes.ru/.data/video/EtudesRu_wheel-inventing@fhd.mp4</video:content_loc>
      <video:thumbnail_loc>https://it.etudes.ru/.data/etudes/wheel-inventing/thumb@fhd.jpg</video:thumbnail_loc>
      <video:title><![CDATA[Inventare la ruota]]></video:title>
      <video:description><![CDATA[Può un carretto montato su ruote non circolari muoversi senza scossoni su un terreno liscio?]]></video:description>
      <video:duration>377</video:duration>
    </video:video>
  </url>
  <url>
    <loc>https://it.etudes.ru/etudes/catenary/</loc>
    <lastmod>2009-05-25</lastmod>
    <image:image>
      <image:loc>https://it.etudes.ru/.data/etudes/catenary/01@fhd.jpg</image:loc>
      <image:title><![CDATA[Catenaria]]></image:title>
    </image:image>
    <image:image>
      <image:loc>https://it.etudes.ru/.data/etudes/catenary/01@hd.jpg</image:loc>
      <image:title><![CDATA[Catenaria]]></image:title>
    </image:image>
    <image:image>
      <image:loc>https://it.etudes.ru/.data/etudes/catenary/01.jpg</image:loc>
      <image:title><![CDATA[Catenaria]]></image:title>
    </image:image>
    <image:image>
      <image:loc>https://it.etudes.ru/.data/etudes/catenary/02@fhd.jpg</image:loc>
      <image:title><![CDATA[Catenaria]]></image:title>
    </image:image>
    <image:image>
      <image:loc>https://it.etudes.ru/.data/etudes/catenary/02@hd.jpg</image:loc>
      <image:title><![CDATA[Catenaria]]></image:title>
    </image:image>
    <image:image>
      <image:loc>https://it.etudes.ru/.data/etudes/catenary/02.jpg</image:loc>
      <image:title><![CDATA[Catenaria]]></image:title>
    </image:image>
    <image:image>
      <image:loc>https://it.etudes.ru/.data/etudes/catenary/03@fhd.jpg</image:loc>
      <image:title><![CDATA[Catenaria]]></image:title>
    </image:image>
    <image:image>
      <image:loc>https://it.etudes.ru/.data/etudes/catenary/03@hd.jpg</image:loc>
      <image:title><![CDATA[Catenaria]]></image:title>
    </image:image>
    <image:image>
      <image:loc>https://it.etudes.ru/.data/etudes/catenary/03.jpg</image:loc>
      <image:title><![CDATA[Catenaria]]></image:title>
    </image:image>
    <image:image>
      <image:loc>https://it.etudes.ru/.data/etudes/catenary/04@fhd.jpg</image:loc>
      <image:title><![CDATA[Catenaria]]></image:title>
    </image:image>
    <image:image>
      <image:loc>https://it.etudes.ru/.data/etudes/catenary/04@hd.jpg</image:loc>
      <image:title><![CDATA[Catenaria]]></image:title>
    </image:image>
    <image:image>
      <image:loc>https://it.etudes.ru/.data/etudes/catenary/04.jpg</image:loc>
      <image:title><![CDATA[Catenaria]]></image:title>
    </image:image>
    <image:image>
      <image:loc>https://it.etudes.ru/.data/etudes/catenary/05@fhd.jpg</image:loc>
      <image:title><![CDATA[Catenaria]]></image:title>
    </image:image>
    <image:image>
      <image:loc>https://it.etudes.ru/.data/etudes/catenary/05@hd.jpg</image:loc>
      <image:title><![CDATA[Catenaria]]></image:title>
    </image:image>
    <image:image>
      <image:loc>https://it.etudes.ru/.data/etudes/catenary/05.jpg</image:loc>
      <image:title><![CDATA[Catenaria]]></image:title>
    </image:image>
    <image:image>
      <image:loc>https://it.etudes.ru/.data/etudes/catenary/06@fhd.jpg</image:loc>
      <image:title><![CDATA[Catenaria]]></image:title>
    </image:image>
    <image:image>
      <image:loc>https://it.etudes.ru/.data/etudes/catenary/06@hd.jpg</image:loc>
      <image:title><![CDATA[Catenaria]]></image:title>
    </image:image>
    <image:image>
      <image:loc>https://it.etudes.ru/.data/etudes/catenary/06.jpg</image:loc>
      <image:title><![CDATA[Catenaria]]></image:title>
    </image:image>
    <image:image>
      <image:loc>https://it.etudes.ru/.data/etudes/catenary/07@fhd.jpg</image:loc>
      <image:title><![CDATA[Catenaria]]></image:title>
    </image:image>
    <image:image>
      <image:loc>https://it.etudes.ru/.data/etudes/catenary/07@hd.jpg</image:loc>
      <image:title><![CDATA[Catenaria]]></image:title>
    </image:image>
    <image:image>
      <image:loc>https://it.etudes.ru/.data/etudes/catenary/07.jpg</image:loc>
      <image:title><![CDATA[Catenaria]]></image:title>
    </image:image>
    <image:image>
      <image:loc>https://it.etudes.ru/.data/etudes/catenary/08@fhd.jpg</image:loc>
      <image:title><![CDATA[Catenaria]]></image:title>
    </image:image>
    <image:image>
      <image:loc>https://it.etudes.ru/.data/etudes/catenary/08@hd.jpg</image:loc>
      <image:title><![CDATA[Catenaria]]></image:title>
    </image:image>
    <image:image>
      <image:loc>https://it.etudes.ru/.data/etudes/catenary/08.jpg</image:loc>
      <image:title><![CDATA[Catenaria]]></image:title>
    </image:image>
    <image:image>
      <image:loc>https://it.etudes.ru/.data/etudes/catenary/09@fhd.jpg</image:loc>
      <image:title><![CDATA[Catenaria]]></image:title>
    </image:image>
    <image:image>
      <image:loc>https://it.etudes.ru/.data/etudes/catenary/09@hd.jpg</image:loc>
      <image:title><![CDATA[Catenaria]]></image:title>
    </image:image>
    <image:image>
      <image:loc>https://it.etudes.ru/.data/etudes/catenary/09.jpg</image:loc>
      <image:title><![CDATA[Catenaria]]></image:title>
    </image:image>
    <image:image>
      <image:loc>https://it.etudes.ru/.data/etudes/catenary/10@fhd.jpg</image:loc>
      <image:title><![CDATA[Catenaria]]></image:title>
    </image:image>
    <image:image>
      <image:loc>https://it.etudes.ru/.data/etudes/catenary/10@hd.jpg</image:loc>
      <image:title><![CDATA[Catenaria]]></image:title>
    </image:image>
    <image:image>
      <image:loc>https://it.etudes.ru/.data/etudes/catenary/10.jpg</image:loc>
      <image:title><![CDATA[Catenaria]]></image:title>
    </image:image>
    <image:image>
      <image:loc>https://it.etudes.ru/.data/etudes/catenary/11@fhd.jpg</image:loc>
      <image:title><![CDATA[Catenaria]]></image:title>
    </image:image>
    <image:image>
      <image:loc>https://it.etudes.ru/.data/etudes/catenary/11@hd.jpg</image:loc>
      <image:title><![CDATA[Catenaria]]></image:title>
    </image:image>
    <image:image>
      <image:loc>https://it.etudes.ru/.data/etudes/catenary/11.jpg</image:loc>
      <image:title><![CDATA[Catenaria]]></image:title>
    </image:image>
    <video:video>
      <video:content_loc>https://it.etudes.ru/.data/video/EtudesRu_catenary@fhd.mp4</video:content_loc>
      <video:thumbnail_loc>https://it.etudes.ru/.data/etudes/catenary/thumb@fhd.jpg</video:thumbnail_loc>
      <video:title><![CDATA[Catenaria]]></video:title>
      <video:description><![CDATA[E voi sapete spostarvi su delle ruote quadrate?]]></video:description>
      <video:duration>88</video:duration>
    </video:video>
  </url>
  <url>
    <loc>https://it.etudes.ru/etudes/steering-geometry/</loc>
    <lastmod>2009-03-26</lastmod>
    <image:image>
      <image:loc>https://it.etudes.ru/.data/etudes/steering-geometry/01@fhd.jpg</image:loc>
      <image:title><![CDATA[Geometria dello sterzo]]></image:title>
    </image:image>
    <image:image>
      <image:loc>https://it.etudes.ru/.data/etudes/steering-geometry/01@hd.jpg</image:loc>
      <image:title><![CDATA[Geometria dello sterzo]]></image:title>
    </image:image>
    <image:image>
      <image:loc>https://it.etudes.ru/.data/etudes/steering-geometry/01.jpg</image:loc>
      <image:title><![CDATA[Geometria dello sterzo]]></image:title>
    </image:image>
    <image:image>
      <image:loc>https://it.etudes.ru/.data/etudes/steering-geometry/02@fhd.jpg</image:loc>
      <image:title><![CDATA[Geometria dello sterzo]]></image:title>
    </image:image>
    <image:image>
      <image:loc>https://it.etudes.ru/.data/etudes/steering-geometry/02@hd.jpg</image:loc>
      <image:title><![CDATA[Geometria dello sterzo]]></image:title>
    </image:image>
    <image:image>
      <image:loc>https://it.etudes.ru/.data/etudes/steering-geometry/02.jpg</image:loc>
      <image:title><![CDATA[Geometria dello sterzo]]></image:title>
    </image:image>
    <image:image>
      <image:loc>https://it.etudes.ru/.data/etudes/steering-geometry/03@fhd.jpg</image:loc>
      <image:title><![CDATA[Geometria dello sterzo]]></image:title>
    </image:image>
    <image:image>
      <image:loc>https://it.etudes.ru/.data/etudes/steering-geometry/03@hd.jpg</image:loc>
      <image:title><![CDATA[Geometria dello sterzo]]></image:title>
    </image:image>
    <image:image>
      <image:loc>https://it.etudes.ru/.data/etudes/steering-geometry/03.jpg</image:loc>
      <image:title><![CDATA[Geometria dello sterzo]]></image:title>
    </image:image>
    <image:image>
      <image:loc>https://it.etudes.ru/.data/etudes/steering-geometry/04@fhd.jpg</image:loc>
      <image:title><![CDATA[Geometria dello sterzo]]></image:title>
    </image:image>
    <image:image>
      <image:loc>https://it.etudes.ru/.data/etudes/steering-geometry/04@hd.jpg</image:loc>
      <image:title><![CDATA[Geometria dello sterzo]]></image:title>
    </image:image>
    <image:image>
      <image:loc>https://it.etudes.ru/.data/etudes/steering-geometry/04.jpg</image:loc>
      <image:title><![CDATA[Geometria dello sterzo]]></image:title>
    </image:image>
    <image:image>
      <image:loc>https://it.etudes.ru/.data/etudes/steering-geometry/05@fhd.jpg</image:loc>
      <image:title><![CDATA[Geometria dello sterzo]]></image:title>
    </image:image>
    <image:image>
      <image:loc>https://it.etudes.ru/.data/etudes/steering-geometry/05@hd.jpg</image:loc>
      <image:title><![CDATA[Geometria dello sterzo]]></image:title>
    </image:image>
    <image:image>
      <image:loc>https://it.etudes.ru/.data/etudes/steering-geometry/05.jpg</image:loc>
      <image:title><![CDATA[Geometria dello sterzo]]></image:title>
    </image:image>
    <image:image>
      <image:loc>https://it.etudes.ru/.data/etudes/steering-geometry/06@fhd.jpg</image:loc>
      <image:title><![CDATA[Geometria dello sterzo]]></image:title>
    </image:image>
    <image:image>
      <image:loc>https://it.etudes.ru/.data/etudes/steering-geometry/06@hd.jpg</image:loc>
      <image:title><![CDATA[Geometria dello sterzo]]></image:title>
    </image:image>
    <image:image>
      <image:loc>https://it.etudes.ru/.data/etudes/steering-geometry/06.jpg</image:loc>
      <image:title><![CDATA[Geometria dello sterzo]]></image:title>
    </image:image>
    <image:image>
      <image:loc>https://it.etudes.ru/.data/etudes/steering-geometry/07@fhd.jpg</image:loc>
      <image:title><![CDATA[Geometria dello sterzo]]></image:title>
    </image:image>
    <image:image>
      <image:loc>https://it.etudes.ru/.data/etudes/steering-geometry/07@hd.jpg</image:loc>
      <image:title><![CDATA[Geometria dello sterzo]]></image:title>
    </image:image>
    <image:image>
      <image:loc>https://it.etudes.ru/.data/etudes/steering-geometry/07.jpg</image:loc>
      <image:title><![CDATA[Geometria dello sterzo]]></image:title>
    </image:image>
    <image:image>
      <image:loc>https://it.etudes.ru/.data/etudes/steering-geometry/08@fhd.jpg</image:loc>
      <image:title><![CDATA[Geometria dello sterzo]]></image:title>
    </image:image>
    <image:image>
      <image:loc>https://it.etudes.ru/.data/etudes/steering-geometry/08@hd.jpg</image:loc>
      <image:title><![CDATA[Geometria dello sterzo]]></image:title>
    </image:image>
    <image:image>
      <image:loc>https://it.etudes.ru/.data/etudes/steering-geometry/08.jpg</image:loc>
      <image:title><![CDATA[Geometria dello sterzo]]></image:title>
    </image:image>
    <image:image>
      <image:loc>https://it.etudes.ru/.data/etudes/steering-geometry/09@fhd.jpg</image:loc>
      <image:title><![CDATA[Geometria dello sterzo]]></image:title>
    </image:image>
    <image:image>
      <image:loc>https://it.etudes.ru/.data/etudes/steering-geometry/09@hd.jpg</image:loc>
      <image:title><![CDATA[Geometria dello sterzo]]></image:title>
    </image:image>
    <image:image>
      <image:loc>https://it.etudes.ru/.data/etudes/steering-geometry/09.jpg</image:loc>
      <image:title><![CDATA[Geometria dello sterzo]]></image:title>
    </image:image>
    <image:image>
      <image:loc>https://it.etudes.ru/.data/etudes/steering-geometry/10@fhd.jpg</image:loc>
      <image:title><![CDATA[Geometria dello sterzo]]></image:title>
    </image:image>
    <image:image>
      <image:loc>https://it.etudes.ru/.data/etudes/steering-geometry/10@hd.jpg</image:loc>
      <image:title><![CDATA[Geometria dello sterzo]]></image:title>
    </image:image>
    <image:image>
      <image:loc>https://it.etudes.ru/.data/etudes/steering-geometry/10.jpg</image:loc>
      <image:title><![CDATA[Geometria dello sterzo]]></image:title>
    </image:image>
    <image:image>
      <image:loc>https://it.etudes.ru/.data/etudes/steering-geometry/11@fhd.jpg</image:loc>
      <image:title><![CDATA[Geometria dello sterzo]]></image:title>
    </image:image>
    <image:image>
      <image:loc>https://it.etudes.ru/.data/etudes/steering-geometry/11@hd.jpg</image:loc>
      <image:title><![CDATA[Geometria dello sterzo]]></image:title>
    </image:image>
    <image:image>
      <image:loc>https://it.etudes.ru/.data/etudes/steering-geometry/11.jpg</image:loc>
      <image:title><![CDATA[Geometria dello sterzo]]></image:title>
    </image:image>
    <image:image>
      <image:loc>https://it.etudes.ru/.data/etudes/steering-geometry/12@fhd.jpg</image:loc>
      <image:title><![CDATA[Geometria dello sterzo]]></image:title>
    </image:image>
    <image:image>
      <image:loc>https://it.etudes.ru/.data/etudes/steering-geometry/12@hd.jpg</image:loc>
      <image:title><![CDATA[Geometria dello sterzo]]></image:title>
    </image:image>
    <image:image>
      <image:loc>https://it.etudes.ru/.data/etudes/steering-geometry/12.jpg</image:loc>
      <image:title><![CDATA[Geometria dello sterzo]]></image:title>
    </image:image>
    <image:image>
      <image:loc>https://it.etudes.ru/.data/etudes/steering-geometry/13@fhd.jpg</image:loc>
      <image:title><![CDATA[Geometria dello sterzo]]></image:title>
    </image:image>
    <image:image>
      <image:loc>https://it.etudes.ru/.data/etudes/steering-geometry/13@hd.jpg</image:loc>
      <image:title><![CDATA[Geometria dello sterzo]]></image:title>
    </image:image>
    <image:image>
      <image:loc>https://it.etudes.ru/.data/etudes/steering-geometry/13.jpg</image:loc>
      <image:title><![CDATA[Geometria dello sterzo]]></image:title>
    </image:image>
    <image:image>
      <image:loc>https://it.etudes.ru/.data/etudes/steering-geometry/14@fhd.jpg</image:loc>
      <image:title><![CDATA[Geometria dello sterzo]]></image:title>
    </image:image>
    <image:image>
      <image:loc>https://it.etudes.ru/.data/etudes/steering-geometry/14@hd.jpg</image:loc>
      <image:title><![CDATA[Geometria dello sterzo]]></image:title>
    </image:image>
    <image:image>
      <image:loc>https://it.etudes.ru/.data/etudes/steering-geometry/14.jpg</image:loc>
      <image:title><![CDATA[Geometria dello sterzo]]></image:title>
    </image:image>
    <image:image>
      <image:loc>https://it.etudes.ru/.data/etudes/steering-geometry/15@fhd.jpg</image:loc>
      <image:title><![CDATA[Geometria dello sterzo]]></image:title>
    </image:image>
    <image:image>
      <image:loc>https://it.etudes.ru/.data/etudes/steering-geometry/15@hd.jpg</image:loc>
      <image:title><![CDATA[Geometria dello sterzo]]></image:title>
    </image:image>
    <image:image>
      <image:loc>https://it.etudes.ru/.data/etudes/steering-geometry/15.jpg</image:loc>
      <image:title><![CDATA[Geometria dello sterzo]]></image:title>
    </image:image>
    <image:image>
      <image:loc>https://it.etudes.ru/.data/etudes/steering-geometry/16@fhd.jpg</image:loc>
      <image:title><![CDATA[Geometria dello sterzo]]></image:title>
    </image:image>
    <image:image>
      <image:loc>https://it.etudes.ru/.data/etudes/steering-geometry/16@hd.jpg</image:loc>
      <image:title><![CDATA[Geometria dello sterzo]]></image:title>
    </image:image>
    <image:image>
      <image:loc>https://it.etudes.ru/.data/etudes/steering-geometry/16.jpg</image:loc>
      <image:title><![CDATA[Geometria dello sterzo]]></image:title>
    </image:image>
    <image:image>
      <image:loc>https://it.etudes.ru/.data/etudes/steering-geometry/17@fhd.jpg</image:loc>
      <image:title><![CDATA[Geometria dello sterzo]]></image:title>
    </image:image>
    <image:image>
      <image:loc>https://it.etudes.ru/.data/etudes/steering-geometry/17@hd.jpg</image:loc>
      <image:title><![CDATA[Geometria dello sterzo]]></image:title>
    </image:image>
    <image:image>
      <image:loc>https://it.etudes.ru/.data/etudes/steering-geometry/17.jpg</image:loc>
      <image:title><![CDATA[Geometria dello sterzo]]></image:title>
    </image:image>
    <image:image>
      <image:loc>https://it.etudes.ru/.data/etudes/steering-geometry/18@fhd.jpg</image:loc>
      <image:title><![CDATA[Geometria dello sterzo]]></image:title>
    </image:image>
    <image:image>
      <image:loc>https://it.etudes.ru/.data/etudes/steering-geometry/18@hd.jpg</image:loc>
      <image:title><![CDATA[Geometria dello sterzo]]></image:title>
    </image:image>
    <image:image>
      <image:loc>https://it.etudes.ru/.data/etudes/steering-geometry/18.jpg</image:loc>
      <image:title><![CDATA[Geometria dello sterzo]]></image:title>
    </image:image>
    <image:image>
      <image:loc>https://it.etudes.ru/.data/etudes/steering-geometry/19@fhd.jpg</image:loc>
      <image:title><![CDATA[Geometria dello sterzo]]></image:title>
    </image:image>
    <image:image>
      <image:loc>https://it.etudes.ru/.data/etudes/steering-geometry/19@hd.jpg</image:loc>
      <image:title><![CDATA[Geometria dello sterzo]]></image:title>
    </image:image>
    <image:image>
      <image:loc>https://it.etudes.ru/.data/etudes/steering-geometry/19.jpg</image:loc>
      <image:title><![CDATA[Geometria dello sterzo]]></image:title>
    </image:image>
    <image:image>
      <image:loc>https://it.etudes.ru/.data/etudes/steering-geometry/20@fhd.jpg</image:loc>
      <image:title><![CDATA[Geometria dello sterzo]]></image:title>
    </image:image>
    <image:image>
      <image:loc>https://it.etudes.ru/.data/etudes/steering-geometry/20@hd.jpg</image:loc>
      <image:title><![CDATA[Geometria dello sterzo]]></image:title>
    </image:image>
    <image:image>
      <image:loc>https://it.etudes.ru/.data/etudes/steering-geometry/20.jpg</image:loc>
      <image:title><![CDATA[Geometria dello sterzo]]></image:title>
    </image:image>
    <image:image>
      <image:loc>https://it.etudes.ru/.data/etudes/steering-geometry/21@fhd.jpg</image:loc>
      <image:title><![CDATA[Geometria dello sterzo]]></image:title>
    </image:image>
    <image:image>
      <image:loc>https://it.etudes.ru/.data/etudes/steering-geometry/21@hd.jpg</image:loc>
      <image:title><![CDATA[Geometria dello sterzo]]></image:title>
    </image:image>
    <image:image>
      <image:loc>https://it.etudes.ru/.data/etudes/steering-geometry/21.jpg</image:loc>
      <image:title><![CDATA[Geometria dello sterzo]]></image:title>
    </image:image>
    <video:video>
      <video:content_loc>https://it.etudes.ru/.data/video/EtudesRu_steering-geometry@fhd.mp4</video:content_loc>
      <video:thumbnail_loc>https://it.etudes.ru/.data/etudes/steering-geometry/thumb@fhd.jpg</video:thumbnail_loc>
      <video:title><![CDATA[Geometria dello sterzo]]></video:title>
      <video:description><![CDATA[Le ruote dell’automobile sono tra loro parallele quando si sterza.]]></video:description>
      <video:duration>377</video:duration>
    </video:video>
  </url>
  <url>
    <loc>https://it.etudes.ru/etudes/flexible-polyhedra/</loc>
    <lastmod>2009-03-23</lastmod>
    <image:image>
      <image:loc>https://it.etudes.ru/.data/etudes/flexible-polyhedra/01@fhd.jpg</image:loc>
      <image:title><![CDATA[Poliedri flessibili]]></image:title>
    </image:image>
    <image:image>
      <image:loc>https://it.etudes.ru/.data/etudes/flexible-polyhedra/01@hd.jpg</image:loc>
      <image:title><![CDATA[Poliedri flessibili]]></image:title>
    </image:image>
    <image:image>
      <image:loc>https://it.etudes.ru/.data/etudes/flexible-polyhedra/01.jpg</image:loc>
      <image:title><![CDATA[Poliedri flessibili]]></image:title>
    </image:image>
    <image:image>
      <image:loc>https://it.etudes.ru/.data/etudes/flexible-polyhedra/02@fhd.jpg</image:loc>
      <image:title><![CDATA[Poliedri flessibili]]></image:title>
    </image:image>
    <image:image>
      <image:loc>https://it.etudes.ru/.data/etudes/flexible-polyhedra/02@hd.jpg</image:loc>
      <image:title><![CDATA[Poliedri flessibili]]></image:title>
    </image:image>
    <image:image>
      <image:loc>https://it.etudes.ru/.data/etudes/flexible-polyhedra/02.jpg</image:loc>
      <image:title><![CDATA[Poliedri flessibili]]></image:title>
    </image:image>
    <image:image>
      <image:loc>https://it.etudes.ru/.data/etudes/flexible-polyhedra/03@fhd.jpg</image:loc>
      <image:title><![CDATA[Poliedri flessibili]]></image:title>
    </image:image>
    <image:image>
      <image:loc>https://it.etudes.ru/.data/etudes/flexible-polyhedra/03@hd.jpg</image:loc>
      <image:title><![CDATA[Poliedri flessibili]]></image:title>
    </image:image>
    <image:image>
      <image:loc>https://it.etudes.ru/.data/etudes/flexible-polyhedra/03.jpg</image:loc>
      <image:title><![CDATA[Poliedri flessibili]]></image:title>
    </image:image>
    <image:image>
      <image:loc>https://it.etudes.ru/.data/etudes/flexible-polyhedra/04@fhd.jpg</image:loc>
      <image:title><![CDATA[Poliedri flessibili]]></image:title>
    </image:image>
    <image:image>
      <image:loc>https://it.etudes.ru/.data/etudes/flexible-polyhedra/04@hd.jpg</image:loc>
      <image:title><![CDATA[Poliedri flessibili]]></image:title>
    </image:image>
    <image:image>
      <image:loc>https://it.etudes.ru/.data/etudes/flexible-polyhedra/04.jpg</image:loc>
      <image:title><![CDATA[Poliedri flessibili]]></image:title>
    </image:image>
    <image:image>
      <image:loc>https://it.etudes.ru/.data/etudes/flexible-polyhedra/05@fhd.jpg</image:loc>
      <image:title><![CDATA[Poliedri flessibili]]></image:title>
    </image:image>
    <image:image>
      <image:loc>https://it.etudes.ru/.data/etudes/flexible-polyhedra/05@hd.jpg</image:loc>
      <image:title><![CDATA[Poliedri flessibili]]></image:title>
    </image:image>
    <image:image>
      <image:loc>https://it.etudes.ru/.data/etudes/flexible-polyhedra/05.jpg</image:loc>
      <image:title><![CDATA[Poliedri flessibili]]></image:title>
    </image:image>
    <image:image>
      <image:loc>https://it.etudes.ru/.data/etudes/flexible-polyhedra/06@fhd.jpg</image:loc>
      <image:title><![CDATA[Poliedri flessibili]]></image:title>
    </image:image>
    <image:image>
      <image:loc>https://it.etudes.ru/.data/etudes/flexible-polyhedra/06@hd.jpg</image:loc>
      <image:title><![CDATA[Poliedri flessibili]]></image:title>
    </image:image>
    <image:image>
      <image:loc>https://it.etudes.ru/.data/etudes/flexible-polyhedra/06.jpg</image:loc>
      <image:title><![CDATA[Poliedri flessibili]]></image:title>
    </image:image>
    <image:image>
      <image:loc>https://it.etudes.ru/.data/etudes/flexible-polyhedra/07@fhd.jpg</image:loc>
      <image:title><![CDATA[Poliedri flessibili]]></image:title>
    </image:image>
    <image:image>
      <image:loc>https://it.etudes.ru/.data/etudes/flexible-polyhedra/07@hd.jpg</image:loc>
      <image:title><![CDATA[Poliedri flessibili]]></image:title>
    </image:image>
    <image:image>
      <image:loc>https://it.etudes.ru/.data/etudes/flexible-polyhedra/07.jpg</image:loc>
      <image:title><![CDATA[Poliedri flessibili]]></image:title>
    </image:image>
    <image:image>
      <image:loc>https://it.etudes.ru/.data/etudes/flexible-polyhedra/08@fhd.jpg</image:loc>
      <image:title><![CDATA[Poliedri flessibili]]></image:title>
    </image:image>
    <image:image>
      <image:loc>https://it.etudes.ru/.data/etudes/flexible-polyhedra/08@hd.jpg</image:loc>
      <image:title><![CDATA[Poliedri flessibili]]></image:title>
    </image:image>
    <image:image>
      <image:loc>https://it.etudes.ru/.data/etudes/flexible-polyhedra/08.jpg</image:loc>
      <image:title><![CDATA[Poliedri flessibili]]></image:title>
    </image:image>
    <image:image>
      <image:loc>https://it.etudes.ru/.data/etudes/flexible-polyhedra/09@fhd.jpg</image:loc>
      <image:title><![CDATA[Poliedri flessibili]]></image:title>
    </image:image>
    <image:image>
      <image:loc>https://it.etudes.ru/.data/etudes/flexible-polyhedra/09@hd.jpg</image:loc>
      <image:title><![CDATA[Poliedri flessibili]]></image:title>
    </image:image>
    <image:image>
      <image:loc>https://it.etudes.ru/.data/etudes/flexible-polyhedra/09.jpg</image:loc>
      <image:title><![CDATA[Poliedri flessibili]]></image:title>
    </image:image>
    <image:image>
      <image:loc>https://it.etudes.ru/.data/etudes/flexible-polyhedra/10@fhd.jpg</image:loc>
      <image:title><![CDATA[Poliedri flessibili]]></image:title>
    </image:image>
    <image:image>
      <image:loc>https://it.etudes.ru/.data/etudes/flexible-polyhedra/10@hd.jpg</image:loc>
      <image:title><![CDATA[Poliedri flessibili]]></image:title>
    </image:image>
    <image:image>
      <image:loc>https://it.etudes.ru/.data/etudes/flexible-polyhedra/10.jpg</image:loc>
      <image:title><![CDATA[Poliedri flessibili]]></image:title>
    </image:image>
    <image:image>
      <image:loc>https://it.etudes.ru/.data/etudes/flexible-polyhedra/11@fhd.jpg</image:loc>
      <image:title><![CDATA[Poliedri flessibili]]></image:title>
    </image:image>
    <image:image>
      <image:loc>https://it.etudes.ru/.data/etudes/flexible-polyhedra/11@hd.jpg</image:loc>
      <image:title><![CDATA[Poliedri flessibili]]></image:title>
    </image:image>
    <image:image>
      <image:loc>https://it.etudes.ru/.data/etudes/flexible-polyhedra/11.jpg</image:loc>
      <image:title><![CDATA[Poliedri flessibili]]></image:title>
    </image:image>
    <image:image>
      <image:loc>https://it.etudes.ru/.data/etudes/flexible-polyhedra/12@fhd.jpg</image:loc>
      <image:title><![CDATA[Poliedri flessibili]]></image:title>
    </image:image>
    <image:image>
      <image:loc>https://it.etudes.ru/.data/etudes/flexible-polyhedra/12@hd.jpg</image:loc>
      <image:title><![CDATA[Poliedri flessibili]]></image:title>
    </image:image>
    <image:image>
      <image:loc>https://it.etudes.ru/.data/etudes/flexible-polyhedra/12.jpg</image:loc>
      <image:title><![CDATA[Poliedri flessibili]]></image:title>
    </image:image>
    <image:image>
      <image:loc>https://it.etudes.ru/.data/etudes/flexible-polyhedra/13@fhd.jpg</image:loc>
      <image:title><![CDATA[Poliedri flessibili]]></image:title>
    </image:image>
    <image:image>
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      <image:title><![CDATA[Poliedri flessibili]]></image:title>
    </image:image>
    <image:image>
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      <image:title><![CDATA[Poliedri flessibili]]></image:title>
    </image:image>
    <image:image>
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      <image:title><![CDATA[Poliedri flessibili]]></image:title>
    </image:image>
    <image:image>
      <image:loc>https://it.etudes.ru/.data/etudes/flexible-polyhedra/14@hd.jpg</image:loc>
      <image:title><![CDATA[Poliedri flessibili]]></image:title>
    </image:image>
    <image:image>
      <image:loc>https://it.etudes.ru/.data/etudes/flexible-polyhedra/14.jpg</image:loc>
      <image:title><![CDATA[Poliedri flessibili]]></image:title>
    </image:image>
    <image:image>
      <image:loc>https://it.etudes.ru/.data/etudes/flexible-polyhedra/15@fhd.jpg</image:loc>
      <image:title><![CDATA[Poliedri flessibili]]></image:title>
    </image:image>
    <image:image>
      <image:loc>https://it.etudes.ru/.data/etudes/flexible-polyhedra/15@hd.jpg</image:loc>
      <image:title><![CDATA[Poliedri flessibili]]></image:title>
    </image:image>
    <image:image>
      <image:loc>https://it.etudes.ru/.data/etudes/flexible-polyhedra/15.jpg</image:loc>
      <image:title><![CDATA[Poliedri flessibili]]></image:title>
    </image:image>
    <image:image>
      <image:loc>https://it.etudes.ru/.data/etudes/flexible-polyhedra/16@fhd.jpg</image:loc>
      <image:title><![CDATA[Poliedri flessibili]]></image:title>
    </image:image>
    <image:image>
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      <image:title><![CDATA[Poliedri flessibili]]></image:title>
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    <image:image>
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      <image:title><![CDATA[Poliedri flessibili]]></image:title>
    </image:image>
    <image:image>
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      <image:title><![CDATA[Poliedri flessibili]]></image:title>
    </image:image>
    <image:image>
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      <image:title><![CDATA[Poliedri flessibili]]></image:title>
    </image:image>
    <image:image>
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      <image:title><![CDATA[Poliedri flessibili]]></image:title>
    </image:image>
    <image:image>
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      <image:title><![CDATA[Poliedri flessibili]]></image:title>
    </image:image>
    <image:image>
      <image:loc>https://it.etudes.ru/.data/etudes/flexible-polyhedra/18@hd.jpg</image:loc>
      <image:title><![CDATA[Poliedri flessibili]]></image:title>
    </image:image>
    <image:image>
      <image:loc>https://it.etudes.ru/.data/etudes/flexible-polyhedra/18.jpg</image:loc>
      <image:title><![CDATA[Poliedri flessibili]]></image:title>
    </image:image>
    <image:image>
      <image:loc>https://it.etudes.ru/.data/etudes/flexible-polyhedra/19@fhd.jpg</image:loc>
      <image:title><![CDATA[Poliedri flessibili]]></image:title>
    </image:image>
    <image:image>
      <image:loc>https://it.etudes.ru/.data/etudes/flexible-polyhedra/19@hd.jpg</image:loc>
      <image:title><![CDATA[Poliedri flessibili]]></image:title>
    </image:image>
    <image:image>
      <image:loc>https://it.etudes.ru/.data/etudes/flexible-polyhedra/19.jpg</image:loc>
      <image:title><![CDATA[Poliedri flessibili]]></image:title>
    </image:image>
    <image:image>
      <image:loc>https://it.etudes.ru/.data/etudes/flexible-polyhedra/20@fhd.jpg</image:loc>
      <image:title><![CDATA[Poliedri flessibili]]></image:title>
    </image:image>
    <image:image>
      <image:loc>https://it.etudes.ru/.data/etudes/flexible-polyhedra/20@hd.jpg</image:loc>
      <image:title><![CDATA[Poliedri flessibili]]></image:title>
    </image:image>
    <image:image>
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      <image:title><![CDATA[Poliedri flessibili]]></image:title>
    </image:image>
    <image:image>
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      <image:title><![CDATA[Poliedri flessibili]]></image:title>
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    <image:image>
      <image:loc>https://it.etudes.ru/.data/etudes/flexible-polyhedra/21@hd.jpg</image:loc>
      <image:title><![CDATA[Poliedri flessibili]]></image:title>
    </image:image>
    <image:image>
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      <image:title><![CDATA[Poliedri flessibili]]></image:title>
    </image:image>
    <image:image>
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      <image:title><![CDATA[Poliedri flessibili]]></image:title>
    </image:image>
    <image:image>
      <image:loc>https://it.etudes.ru/.data/etudes/flexible-polyhedra/22@hd.jpg</image:loc>
      <image:title><![CDATA[Poliedri flessibili]]></image:title>
    </image:image>
    <image:image>
      <image:loc>https://it.etudes.ru/.data/etudes/flexible-polyhedra/22.jpg</image:loc>
      <image:title><![CDATA[Poliedri flessibili]]></image:title>
    </image:image>
    <video:video>
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      <video:thumbnail_loc>https://it.etudes.ru/.data/etudes/flexible-polyhedra/thumb@fhd.jpg</video:thumbnail_loc>
      <video:title><![CDATA[Poliedri flessibili]]></video:title>
      <video:description><![CDATA[Esistono poliedri chiusi piegabili?]]></video:description>
      <video:duration>377</video:duration>
    </video:video>
  </url>
  <url>
    <loc>https://it.etudes.ru/etudes/monge-theorem/</loc>
    <lastmod>2009-03-23</lastmod>
    <image:image>
      <image:loc>https://it.etudes.ru/.data/etudes/monge-theorem/01@fhd.jpg</image:loc>
      <image:title><![CDATA[Uscire nello spazio]]></image:title>
    </image:image>
    <image:image>
      <image:loc>https://it.etudes.ru/.data/etudes/monge-theorem/01@hd.jpg</image:loc>
      <image:title><![CDATA[Uscire nello spazio]]></image:title>
    </image:image>
    <image:image>
      <image:loc>https://it.etudes.ru/.data/etudes/monge-theorem/01.jpg</image:loc>
      <image:title><![CDATA[Uscire nello spazio]]></image:title>
    </image:image>
    <image:image>
      <image:loc>https://it.etudes.ru/.data/etudes/monge-theorem/02@fhd.jpg</image:loc>
      <image:title><![CDATA[Uscire nello spazio]]></image:title>
    </image:image>
    <image:image>
      <image:loc>https://it.etudes.ru/.data/etudes/monge-theorem/02@hd.jpg</image:loc>
      <image:title><![CDATA[Uscire nello spazio]]></image:title>
    </image:image>
    <image:image>
      <image:loc>https://it.etudes.ru/.data/etudes/monge-theorem/02.jpg</image:loc>
      <image:title><![CDATA[Uscire nello spazio]]></image:title>
    </image:image>
    <image:image>
      <image:loc>https://it.etudes.ru/.data/etudes/monge-theorem/03@fhd.jpg</image:loc>
      <image:title><![CDATA[Uscire nello spazio]]></image:title>
    </image:image>
    <image:image>
      <image:loc>https://it.etudes.ru/.data/etudes/monge-theorem/03@hd.jpg</image:loc>
      <image:title><![CDATA[Uscire nello spazio]]></image:title>
    </image:image>
    <image:image>
      <image:loc>https://it.etudes.ru/.data/etudes/monge-theorem/03.jpg</image:loc>
      <image:title><![CDATA[Uscire nello spazio]]></image:title>
    </image:image>
    <video:video>
      <video:content_loc>https://it.etudes.ru/.data/video/EtudesRu_Monge-theorem@fhd.mp4</video:content_loc>
      <video:thumbnail_loc>https://it.etudes.ru/.data/etudes/monge-theorem/thumb@fhd.jpg</video:thumbnail_loc>
      <video:title><![CDATA[Uscire nello spazio]]></video:title>
      <video:description><![CDATA[Spesso è possibile imparare molto di più su un oggetto, uscendo fuori dallo spazio in cui esso è immer.]]></video:description>
      <video:duration>377</video:duration>
    </video:video>
  </url>
  <url>
    <loc>https://it.etudes.ru/etudes/ball-volume/</loc>
    <lastmod>2008-11-27</lastmod>
    <image:image>
      <image:loc>https://it.etudes.ru/.data/etudes/ball-volume/01@fhd.jpg</image:loc>
      <image:title><![CDATA[Il volume della sfera]]></image:title>
    </image:image>
    <image:image>
      <image:loc>https://it.etudes.ru/.data/etudes/ball-volume/01@hd.jpg</image:loc>
      <image:title><![CDATA[Il volume della sfera]]></image:title>
    </image:image>
    <image:image>
      <image:loc>https://it.etudes.ru/.data/etudes/ball-volume/01.jpg</image:loc>
      <image:title><![CDATA[Il volume della sfera]]></image:title>
    </image:image>
    <image:image>
      <image:loc>https://it.etudes.ru/.data/etudes/ball-volume/02@fhd.jpg</image:loc>
      <image:title><![CDATA[Il volume della sfera]]></image:title>
    </image:image>
    <image:image>
      <image:loc>https://it.etudes.ru/.data/etudes/ball-volume/02@hd.jpg</image:loc>
      <image:title><![CDATA[Il volume della sfera]]></image:title>
    </image:image>
    <image:image>
      <image:loc>https://it.etudes.ru/.data/etudes/ball-volume/02.jpg</image:loc>
      <image:title><![CDATA[Il volume della sfera]]></image:title>
    </image:image>
    <image:image>
      <image:loc>https://it.etudes.ru/.data/etudes/ball-volume/03@fhd.jpg</image:loc>
      <image:title><![CDATA[Il volume della sfera]]></image:title>
    </image:image>
    <image:image>
      <image:loc>https://it.etudes.ru/.data/etudes/ball-volume/03@hd.jpg</image:loc>
      <image:title><![CDATA[Il volume della sfera]]></image:title>
    </image:image>
    <image:image>
      <image:loc>https://it.etudes.ru/.data/etudes/ball-volume/03.jpg</image:loc>
      <image:title><![CDATA[Il volume della sfera]]></image:title>
    </image:image>
    <image:image>
      <image:loc>https://it.etudes.ru/.data/etudes/ball-volume/04@fhd.jpg</image:loc>
      <image:title><![CDATA[Il volume della sfera]]></image:title>
    </image:image>
    <image:image>
      <image:loc>https://it.etudes.ru/.data/etudes/ball-volume/04@hd.jpg</image:loc>
      <image:title><![CDATA[Il volume della sfera]]></image:title>
    </image:image>
    <image:image>
      <image:loc>https://it.etudes.ru/.data/etudes/ball-volume/04.jpg</image:loc>
      <image:title><![CDATA[Il volume della sfera]]></image:title>
    </image:image>
    <image:image>
      <image:loc>https://it.etudes.ru/.data/etudes/ball-volume/05@fhd.jpg</image:loc>
      <image:title><![CDATA[Il volume della sfera]]></image:title>
    </image:image>
    <image:image>
      <image:loc>https://it.etudes.ru/.data/etudes/ball-volume/05@hd.jpg</image:loc>
      <image:title><![CDATA[Il volume della sfera]]></image:title>
    </image:image>
    <image:image>
      <image:loc>https://it.etudes.ru/.data/etudes/ball-volume/05.jpg</image:loc>
      <image:title><![CDATA[Il volume della sfera]]></image:title>
    </image:image>
    <image:image>
      <image:loc>https://it.etudes.ru/.data/etudes/ball-volume/06@fhd.jpg</image:loc>
      <image:title><![CDATA[Il volume della sfera]]></image:title>
    </image:image>
    <image:image>
      <image:loc>https://it.etudes.ru/.data/etudes/ball-volume/06@hd.jpg</image:loc>
      <image:title><![CDATA[Il volume della sfera]]></image:title>
    </image:image>
    <image:image>
      <image:loc>https://it.etudes.ru/.data/etudes/ball-volume/06.jpg</image:loc>
      <image:title><![CDATA[Il volume della sfera]]></image:title>
    </image:image>
    <image:image>
      <image:loc>https://it.etudes.ru/.data/etudes/ball-volume/07@fhd.jpg</image:loc>
      <image:title><![CDATA[Il volume della sfera]]></image:title>
    </image:image>
    <image:image>
      <image:loc>https://it.etudes.ru/.data/etudes/ball-volume/07@hd.jpg</image:loc>
      <image:title><![CDATA[Il volume della sfera]]></image:title>
    </image:image>
    <image:image>
      <image:loc>https://it.etudes.ru/.data/etudes/ball-volume/07.jpg</image:loc>
      <image:title><![CDATA[Il volume della sfera]]></image:title>
    </image:image>
    <video:video>
      <video:content_loc>https://it.etudes.ru/.data/video/EtudesRu_ball-volume@fhd.mp4</video:content_loc>
      <video:thumbnail_loc>https://it.etudes.ru/.data/etudes/ball-volume/thumb@fhd.jpg</video:thumbnail_loc>
      <video:title><![CDATA[Il volume della sfera]]></video:title>
      <video:description><![CDATA[Quando acquistate un’arancia con la buccia spessa,  voi sapete che state comprando principalmente la sua buccia?]]></video:description>
      <video:duration>377</video:duration>
    </video:video>
  </url>
  <url>
    <loc>https://it.etudes.ru/etudes/shadows/</loc>
    <lastmod>2008-10-02</lastmod>
    <image:image>
      <image:loc>https://it.etudes.ru/.data/etudes/shadows/01@fhd.jpg</image:loc>
      <image:title><![CDATA[Ombre]]></image:title>
    </image:image>
    <image:image>
      <image:loc>https://it.etudes.ru/.data/etudes/shadows/01@hd.jpg</image:loc>
      <image:title><![CDATA[Ombre]]></image:title>
    </image:image>
    <image:image>
      <image:loc>https://it.etudes.ru/.data/etudes/shadows/01.jpg</image:loc>
      <image:title><![CDATA[Ombre]]></image:title>
    </image:image>
    <image:image>
      <image:loc>https://it.etudes.ru/.data/etudes/shadows/02@fhd.jpg</image:loc>
      <image:title><![CDATA[Ombre]]></image:title>
    </image:image>
    <image:image>
      <image:loc>https://it.etudes.ru/.data/etudes/shadows/02@hd.jpg</image:loc>
      <image:title><![CDATA[Ombre]]></image:title>
    </image:image>
    <image:image>
      <image:loc>https://it.etudes.ru/.data/etudes/shadows/02.jpg</image:loc>
      <image:title><![CDATA[Ombre]]></image:title>
    </image:image>
    <image:image>
      <image:loc>https://it.etudes.ru/.data/etudes/shadows/03@fhd.jpg</image:loc>
      <image:title><![CDATA[Ombre]]></image:title>
    </image:image>
    <image:image>
      <image:loc>https://it.etudes.ru/.data/etudes/shadows/03@hd.jpg</image:loc>
      <image:title><![CDATA[Ombre]]></image:title>
    </image:image>
    <image:image>
      <image:loc>https://it.etudes.ru/.data/etudes/shadows/03.jpg</image:loc>
      <image:title><![CDATA[Ombre]]></image:title>
    </image:image>
    <image:image>
      <image:loc>https://it.etudes.ru/.data/etudes/shadows/04@fhd.jpg</image:loc>
      <image:title><![CDATA[Ombre]]></image:title>
    </image:image>
    <image:image>
      <image:loc>https://it.etudes.ru/.data/etudes/shadows/04@hd.jpg</image:loc>
      <image:title><![CDATA[Ombre]]></image:title>
    </image:image>
    <image:image>
      <image:loc>https://it.etudes.ru/.data/etudes/shadows/04.jpg</image:loc>
      <image:title><![CDATA[Ombre]]></image:title>
    </image:image>
    <image:image>
      <image:loc>https://it.etudes.ru/.data/etudes/shadows/05@fhd.jpg</image:loc>
      <image:title><![CDATA[Ombre]]></image:title>
    </image:image>
    <image:image>
      <image:loc>https://it.etudes.ru/.data/etudes/shadows/05@hd.jpg</image:loc>
      <image:title><![CDATA[Ombre]]></image:title>
    </image:image>
    <image:image>
      <image:loc>https://it.etudes.ru/.data/etudes/shadows/05.jpg</image:loc>
      <image:title><![CDATA[Ombre]]></image:title>
    </image:image>
    <image:image>
      <image:loc>https://it.etudes.ru/.data/etudes/shadows/06@fhd.jpg</image:loc>
      <image:title><![CDATA[Ombre]]></image:title>
    </image:image>
    <image:image>
      <image:loc>https://it.etudes.ru/.data/etudes/shadows/06@hd.jpg</image:loc>
      <image:title><![CDATA[Ombre]]></image:title>
    </image:image>
    <image:image>
      <image:loc>https://it.etudes.ru/.data/etudes/shadows/06.jpg</image:loc>
      <image:title><![CDATA[Ombre]]></image:title>
    </image:image>
    <image:image>
      <image:loc>https://it.etudes.ru/.data/etudes/shadows/07@fhd.jpg</image:loc>
      <image:title><![CDATA[Ombre]]></image:title>
    </image:image>
    <image:image>
      <image:loc>https://it.etudes.ru/.data/etudes/shadows/07@hd.jpg</image:loc>
      <image:title><![CDATA[Ombre]]></image:title>
    </image:image>
    <image:image>
      <image:loc>https://it.etudes.ru/.data/etudes/shadows/07.jpg</image:loc>
      <image:title><![CDATA[Ombre]]></image:title>
    </image:image>
    <image:image>
      <image:loc>https://it.etudes.ru/.data/etudes/shadows/08@fhd.jpg</image:loc>
      <image:title><![CDATA[Ombre]]></image:title>
    </image:image>
    <image:image>
      <image:loc>https://it.etudes.ru/.data/etudes/shadows/08@hd.jpg</image:loc>
      <image:title><![CDATA[Ombre]]></image:title>
    </image:image>
    <image:image>
      <image:loc>https://it.etudes.ru/.data/etudes/shadows/08.jpg</image:loc>
      <image:title><![CDATA[Ombre]]></image:title>
    </image:image>
    <image:image>
      <image:loc>https://it.etudes.ru/.data/etudes/shadows/09@fhd.jpg</image:loc>
      <image:title><![CDATA[Ombre]]></image:title>
    </image:image>
    <image:image>
      <image:loc>https://it.etudes.ru/.data/etudes/shadows/09@hd.jpg</image:loc>
      <image:title><![CDATA[Ombre]]></image:title>
    </image:image>
    <image:image>
      <image:loc>https://it.etudes.ru/.data/etudes/shadows/09.jpg</image:loc>
      <image:title><![CDATA[Ombre]]></image:title>
    </image:image>
    <video:video>
      <video:content_loc>https://it.etudes.ru/.data/video/EtudesRu_shadows@fhd.mp4</video:content_loc>
      <video:thumbnail_loc>https://it.etudes.ru/.data/etudes/shadows/thumb@fhd.jpg</video:thumbnail_loc>
      <video:title><![CDATA[Ombre]]></video:title>
      <video:description><![CDATA[Tre proiezioni tra loro ortogonali dello stesso oggetto sono dei quadrati. L’oggetto è necessariamente un cubo?]]></video:description>
      <video:duration>377</video:duration>
    </video:video>
  </url>
  <url>
    <loc>https://it.etudes.ru/etudes/axioms/</loc>
    <lastmod>2008-09-18</lastmod>
    <image:image>
      <image:loc>https://it.etudes.ru/.data/etudes/axioms/01@fhd.jpg</image:loc>
      <image:title><![CDATA[Assiomi]]></image:title>
    </image:image>
    <image:image>
      <image:loc>https://it.etudes.ru/.data/etudes/axioms/01@hd.jpg</image:loc>
      <image:title><![CDATA[Assiomi]]></image:title>
    </image:image>
    <image:image>
      <image:loc>https://it.etudes.ru/.data/etudes/axioms/01.jpg</image:loc>
      <image:title><![CDATA[Assiomi]]></image:title>
    </image:image>
    <image:image>
      <image:loc>https://it.etudes.ru/.data/etudes/axioms/02@fhd.jpg</image:loc>
      <image:title><![CDATA[Assiomi]]></image:title>
    </image:image>
    <image:image>
      <image:loc>https://it.etudes.ru/.data/etudes/axioms/02@hd.jpg</image:loc>
      <image:title><![CDATA[Assiomi]]></image:title>
    </image:image>
    <image:image>
      <image:loc>https://it.etudes.ru/.data/etudes/axioms/02.jpg</image:loc>
      <image:title><![CDATA[Assiomi]]></image:title>
    </image:image>
    <image:image>
      <image:loc>https://it.etudes.ru/.data/etudes/axioms/03@fhd.jpg</image:loc>
      <image:title><![CDATA[Assiomi]]></image:title>
    </image:image>
    <image:image>
      <image:loc>https://it.etudes.ru/.data/etudes/axioms/03@hd.jpg</image:loc>
      <image:title><![CDATA[Assiomi]]></image:title>
    </image:image>
    <image:image>
      <image:loc>https://it.etudes.ru/.data/etudes/axioms/03.jpg</image:loc>
      <image:title><![CDATA[Assiomi]]></image:title>
    </image:image>
    <image:image>
      <image:loc>https://it.etudes.ru/.data/etudes/axioms/04@fhd.jpg</image:loc>
      <image:title><![CDATA[Assiomi]]></image:title>
    </image:image>
    <image:image>
      <image:loc>https://it.etudes.ru/.data/etudes/axioms/04@hd.jpg</image:loc>
      <image:title><![CDATA[Assiomi]]></image:title>
    </image:image>
    <image:image>
      <image:loc>https://it.etudes.ru/.data/etudes/axioms/04.jpg</image:loc>
      <image:title><![CDATA[Assiomi]]></image:title>
    </image:image>
    <image:image>
      <image:loc>https://it.etudes.ru/.data/etudes/axioms/05@fhd.jpg</image:loc>
      <image:title><![CDATA[Assiomi]]></image:title>
    </image:image>
    <image:image>
      <image:loc>https://it.etudes.ru/.data/etudes/axioms/05@hd.jpg</image:loc>
      <image:title><![CDATA[Assiomi]]></image:title>
    </image:image>
    <image:image>
      <image:loc>https://it.etudes.ru/.data/etudes/axioms/05.jpg</image:loc>
      <image:title><![CDATA[Assiomi]]></image:title>
    </image:image>
    <image:image>
      <image:loc>https://it.etudes.ru/.data/etudes/axioms/06@fhd.jpg</image:loc>
      <image:title><![CDATA[Assiomi]]></image:title>
    </image:image>
    <image:image>
      <image:loc>https://it.etudes.ru/.data/etudes/axioms/06@hd.jpg</image:loc>
      <image:title><![CDATA[Assiomi]]></image:title>
    </image:image>
    <image:image>
      <image:loc>https://it.etudes.ru/.data/etudes/axioms/06.jpg</image:loc>
      <image:title><![CDATA[Assiomi]]></image:title>
    </image:image>
    <video:video>
      <video:content_loc>https://it.etudes.ru/.data/video/EtudesRu_axioms@fhd.mp4</video:content_loc>
      <video:thumbnail_loc>https://it.etudes.ru/.data/etudes/axioms/thumb@fhd.jpg</video:thumbnail_loc>
      <video:title><![CDATA[Assiomi]]></video:title>
      <video:description><![CDATA[Quale sgabello è più stabile su un pavimento diseguale: quello con tre oppure quello con quattro gambe?]]></video:description>
      <video:duration>377</video:duration>
    </video:video>
  </url>
  <url>
    <loc>https://it.etudes.ru/etudes/translation-rotation/</loc>
    <lastmod>2008-06-02</lastmod>
    <image:image>
      <image:loc>https://it.etudes.ru/.data/etudes/translation-rotation/01@fhd.jpg</image:loc>
      <image:title><![CDATA[Traslazioni e rotazioni]]></image:title>
    </image:image>
    <image:image>
      <image:loc>https://it.etudes.ru/.data/etudes/translation-rotation/01@hd.jpg</image:loc>
      <image:title><![CDATA[Traslazioni e rotazioni]]></image:title>
    </image:image>
    <image:image>
      <image:loc>https://it.etudes.ru/.data/etudes/translation-rotation/01.jpg</image:loc>
      <image:title><![CDATA[Traslazioni e rotazioni]]></image:title>
    </image:image>
    <image:image>
      <image:loc>https://it.etudes.ru/.data/etudes/translation-rotation/02@fhd.jpg</image:loc>
      <image:title><![CDATA[Traslazioni e rotazioni]]></image:title>
    </image:image>
    <image:image>
      <image:loc>https://it.etudes.ru/.data/etudes/translation-rotation/02@hd.jpg</image:loc>
      <image:title><![CDATA[Traslazioni e rotazioni]]></image:title>
    </image:image>
    <image:image>
      <image:loc>https://it.etudes.ru/.data/etudes/translation-rotation/02.jpg</image:loc>
      <image:title><![CDATA[Traslazioni e rotazioni]]></image:title>
    </image:image>
    <image:image>
      <image:loc>https://it.etudes.ru/.data/etudes/translation-rotation/03@fhd.jpg</image:loc>
      <image:title><![CDATA[Traslazioni e rotazioni]]></image:title>
    </image:image>
    <image:image>
      <image:loc>https://it.etudes.ru/.data/etudes/translation-rotation/03@hd.jpg</image:loc>
      <image:title><![CDATA[Traslazioni e rotazioni]]></image:title>
    </image:image>
    <image:image>
      <image:loc>https://it.etudes.ru/.data/etudes/translation-rotation/03.jpg</image:loc>
      <image:title><![CDATA[Traslazioni e rotazioni]]></image:title>
    </image:image>
    <image:image>
      <image:loc>https://it.etudes.ru/.data/etudes/translation-rotation/04@fhd.jpg</image:loc>
      <image:title><![CDATA[Traslazioni e rotazioni]]></image:title>
    </image:image>
    <image:image>
      <image:loc>https://it.etudes.ru/.data/etudes/translation-rotation/04@hd.jpg</image:loc>
      <image:title><![CDATA[Traslazioni e rotazioni]]></image:title>
    </image:image>
    <image:image>
      <image:loc>https://it.etudes.ru/.data/etudes/translation-rotation/04.jpg</image:loc>
      <image:title><![CDATA[Traslazioni e rotazioni]]></image:title>
    </image:image>
    <image:image>
      <image:loc>https://it.etudes.ru/.data/etudes/translation-rotation/05@fhd.jpg</image:loc>
      <image:title><![CDATA[Traslazioni e rotazioni]]></image:title>
    </image:image>
    <image:image>
      <image:loc>https://it.etudes.ru/.data/etudes/translation-rotation/05@hd.jpg</image:loc>
      <image:title><![CDATA[Traslazioni e rotazioni]]></image:title>
    </image:image>
    <image:image>
      <image:loc>https://it.etudes.ru/.data/etudes/translation-rotation/05.jpg</image:loc>
      <image:title><![CDATA[Traslazioni e rotazioni]]></image:title>
    </image:image>
    <image:image>
      <image:loc>https://it.etudes.ru/.data/etudes/translation-rotation/06@fhd.jpg</image:loc>
      <image:title><![CDATA[Traslazioni e rotazioni]]></image:title>
    </image:image>
    <image:image>
      <image:loc>https://it.etudes.ru/.data/etudes/translation-rotation/06@hd.jpg</image:loc>
      <image:title><![CDATA[Traslazioni e rotazioni]]></image:title>
    </image:image>
    <image:image>
      <image:loc>https://it.etudes.ru/.data/etudes/translation-rotation/06.jpg</image:loc>
      <image:title><![CDATA[Traslazioni e rotazioni]]></image:title>
    </image:image>
    <image:image>
      <image:loc>https://it.etudes.ru/.data/etudes/translation-rotation/07@fhd.jpg</image:loc>
      <image:title><![CDATA[Traslazioni e rotazioni]]></image:title>
    </image:image>
    <image:image>
      <image:loc>https://it.etudes.ru/.data/etudes/translation-rotation/07@hd.jpg</image:loc>
      <image:title><![CDATA[Traslazioni e rotazioni]]></image:title>
    </image:image>
    <image:image>
      <image:loc>https://it.etudes.ru/.data/etudes/translation-rotation/07.jpg</image:loc>
      <image:title><![CDATA[Traslazioni e rotazioni]]></image:title>
    </image:image>
    <image:image>
      <image:loc>https://it.etudes.ru/.data/etudes/translation-rotation/08@fhd.jpg</image:loc>
      <image:title><![CDATA[Traslazioni e rotazioni]]></image:title>
    </image:image>
    <image:image>
      <image:loc>https://it.etudes.ru/.data/etudes/translation-rotation/08@hd.jpg</image:loc>
      <image:title><![CDATA[Traslazioni e rotazioni]]></image:title>
    </image:image>
    <image:image>
      <image:loc>https://it.etudes.ru/.data/etudes/translation-rotation/08.jpg</image:loc>
      <image:title><![CDATA[Traslazioni e rotazioni]]></image:title>
    </image:image>
    <image:image>
      <image:loc>https://it.etudes.ru/.data/etudes/translation-rotation/09@fhd.jpg</image:loc>
      <image:title><![CDATA[Traslazioni e rotazioni]]></image:title>
    </image:image>
    <image:image>
      <image:loc>https://it.etudes.ru/.data/etudes/translation-rotation/09@hd.jpg</image:loc>
      <image:title><![CDATA[Traslazioni e rotazioni]]></image:title>
    </image:image>
    <image:image>
      <image:loc>https://it.etudes.ru/.data/etudes/translation-rotation/09.jpg</image:loc>
      <image:title><![CDATA[Traslazioni e rotazioni]]></image:title>
    </image:image>
    <image:image>
      <image:loc>https://it.etudes.ru/.data/etudes/translation-rotation/10@fhd.jpg</image:loc>
      <image:title><![CDATA[Traslazioni e rotazioni]]></image:title>
    </image:image>
    <image:image>
      <image:loc>https://it.etudes.ru/.data/etudes/translation-rotation/10@hd.jpg</image:loc>
      <image:title><![CDATA[Traslazioni e rotazioni]]></image:title>
    </image:image>
    <image:image>
      <image:loc>https://it.etudes.ru/.data/etudes/translation-rotation/10.jpg</image:loc>
      <image:title><![CDATA[Traslazioni e rotazioni]]></image:title>
    </image:image>
    <image:image>
      <image:loc>https://it.etudes.ru/.data/etudes/translation-rotation/11@fhd.jpg</image:loc>
      <image:title><![CDATA[Traslazioni e rotazioni]]></image:title>
    </image:image>
    <image:image>
      <image:loc>https://it.etudes.ru/.data/etudes/translation-rotation/11@hd.jpg</image:loc>
      <image:title><![CDATA[Traslazioni e rotazioni]]></image:title>
    </image:image>
    <image:image>
      <image:loc>https://it.etudes.ru/.data/etudes/translation-rotation/11.jpg</image:loc>
      <image:title><![CDATA[Traslazioni e rotazioni]]></image:title>
    </image:image>
    <image:image>
      <image:loc>https://it.etudes.ru/.data/etudes/translation-rotation/12@fhd.jpg</image:loc>
      <image:title><![CDATA[Traslazioni e rotazioni]]></image:title>
    </image:image>
    <image:image>
      <image:loc>https://it.etudes.ru/.data/etudes/translation-rotation/12@hd.jpg</image:loc>
      <image:title><![CDATA[Traslazioni e rotazioni]]></image:title>
    </image:image>
    <image:image>
      <image:loc>https://it.etudes.ru/.data/etudes/translation-rotation/12.jpg</image:loc>
      <image:title><![CDATA[Traslazioni e rotazioni]]></image:title>
    </image:image>
    <video:video>
      <video:content_loc>https://it.etudes.ru/.data/video/EtudesRu_translation-rotation@fhd.mp4</video:content_loc>
      <video:thumbnail_loc>https://it.etudes.ru/.data/etudes/translation-rotation/thumb@fhd.jpg</video:thumbnail_loc>
      <video:title><![CDATA[Traslazioni e rotazioni]]></video:title>
      <video:description><![CDATA[Solleviamo un foglio di carta dal pavimento e lasciamolo andare, in modo che cada sul pavimento in modo casuale ma senza capovolgersi. Quasi sempre la posizione finale e quella iniziale si distingueranno per una rotazione.]]></video:description>
      <video:duration>377</video:duration>
    </video:video>
  </url>
  <url>
    <loc>https://it.etudes.ru/etudes/underground/</loc>
    <lastmod>2008-05-21</lastmod>
    <image:image>
      <image:loc>https://it.etudes.ru/.data/etudes/underground/01@fhd.jpg</image:loc>
      <image:title><![CDATA[A che profondità si trova la stazione del metrò]]></image:title>
    </image:image>
    <image:image>
      <image:loc>https://it.etudes.ru/.data/etudes/underground/01@hd.jpg</image:loc>
      <image:title><![CDATA[A che profondità si trova la stazione del metrò]]></image:title>
    </image:image>
    <image:image>
      <image:loc>https://it.etudes.ru/.data/etudes/underground/01.jpg</image:loc>
      <image:title><![CDATA[A che profondità si trova la stazione del metrò]]></image:title>
    </image:image>
    <image:image>
      <image:loc>https://it.etudes.ru/.data/etudes/underground/02@fhd.jpg</image:loc>
      <image:title><![CDATA[A che profondità si trova la stazione del metrò]]></image:title>
    </image:image>
    <image:image>
      <image:loc>https://it.etudes.ru/.data/etudes/underground/02@hd.jpg</image:loc>
      <image:title><![CDATA[A che profondità si trova la stazione del metrò]]></image:title>
    </image:image>
    <image:image>
      <image:loc>https://it.etudes.ru/.data/etudes/underground/02.jpg</image:loc>
      <image:title><![CDATA[A che profondità si trova la stazione del metrò]]></image:title>
    </image:image>
    <image:image>
      <image:loc>https://it.etudes.ru/.data/etudes/underground/03@fhd.jpg</image:loc>
      <image:title><![CDATA[A che profondità si trova la stazione del metrò]]></image:title>
    </image:image>
    <image:image>
      <image:loc>https://it.etudes.ru/.data/etudes/underground/03@hd.jpg</image:loc>
      <image:title><![CDATA[A che profondità si trova la stazione del metrò]]></image:title>
    </image:image>
    <image:image>
      <image:loc>https://it.etudes.ru/.data/etudes/underground/03.jpg</image:loc>
      <image:title><![CDATA[A che profondità si trova la stazione del metrò]]></image:title>
    </image:image>
    <image:image>
      <image:loc>https://it.etudes.ru/.data/etudes/underground/04@fhd.jpg</image:loc>
      <image:title><![CDATA[A che profondità si trova la stazione del metrò]]></image:title>
    </image:image>
    <image:image>
      <image:loc>https://it.etudes.ru/.data/etudes/underground/04@hd.jpg</image:loc>
      <image:title><![CDATA[A che profondità si trova la stazione del metrò]]></image:title>
    </image:image>
    <image:image>
      <image:loc>https://it.etudes.ru/.data/etudes/underground/04.jpg</image:loc>
      <image:title><![CDATA[A che profondità si trova la stazione del metrò]]></image:title>
    </image:image>
    <image:image>
      <image:loc>https://it.etudes.ru/.data/etudes/underground/05@fhd.jpg</image:loc>
      <image:title><![CDATA[A che profondità si trova la stazione del metrò]]></image:title>
    </image:image>
    <image:image>
      <image:loc>https://it.etudes.ru/.data/etudes/underground/05@hd.jpg</image:loc>
      <image:title><![CDATA[A che profondità si trova la stazione del metrò]]></image:title>
    </image:image>
    <image:image>
      <image:loc>https://it.etudes.ru/.data/etudes/underground/05.jpg</image:loc>
      <image:title><![CDATA[A che profondità si trova la stazione del metrò]]></image:title>
    </image:image>
    <image:image>
      <image:loc>https://it.etudes.ru/.data/etudes/underground/06@fhd.jpg</image:loc>
      <image:title><![CDATA[A che profondità si trova la stazione del metrò]]></image:title>
    </image:image>
    <image:image>
      <image:loc>https://it.etudes.ru/.data/etudes/underground/06@hd.jpg</image:loc>
      <image:title><![CDATA[A che profondità si trova la stazione del metrò]]></image:title>
    </image:image>
    <image:image>
      <image:loc>https://it.etudes.ru/.data/etudes/underground/06.jpg</image:loc>
      <image:title><![CDATA[A che profondità si trova la stazione del metrò]]></image:title>
    </image:image>
    <video:video>
      <video:content_loc>https://it.etudes.ru/.data/video/EtudesRu_underground@fhd.mp4</video:content_loc>
      <video:thumbnail_loc>https://it.etudes.ru/.data/etudes/underground/thumb@fhd.jpg</video:thumbnail_loc>
      <video:title><![CDATA[A che profondità si trova la stazione del metrò]]></video:title>
      <video:description><![CDATA[La scala-mobile della metropolitana… Quante cose sono nascoste dietro a queste parole per un osservatore curioso. Come stimare la profondità di una stazione del metrò, alla quale si accede tramite una scala mobile? Accade che anche per rispondere a questo quesito  può essere utile la conoscenza della matematica!]]></video:description>
      <video:duration>377</video:duration>
    </video:video>
  </url>
  <url>
    <loc>https://it.etudes.ru/etudes/angle-trisection/</loc>
    <lastmod>2008-03-01</lastmod>
    <image:image>
      <image:loc>https://it.etudes.ru/.data/etudes/angle-trisection/01@fhd.jpg</image:loc>
      <image:title><![CDATA[La trisezione dell’angolo]]></image:title>
    </image:image>
    <image:image>
      <image:loc>https://it.etudes.ru/.data/etudes/angle-trisection/01@hd.jpg</image:loc>
      <image:title><![CDATA[La trisezione dell’angolo]]></image:title>
    </image:image>
    <image:image>
      <image:loc>https://it.etudes.ru/.data/etudes/angle-trisection/01.jpg</image:loc>
      <image:title><![CDATA[La trisezione dell’angolo]]></image:title>
    </image:image>
    <image:image>
      <image:loc>https://it.etudes.ru/.data/etudes/angle-trisection/02@fhd.jpg</image:loc>
      <image:title><![CDATA[La trisezione dell’angolo]]></image:title>
    </image:image>
    <image:image>
      <image:loc>https://it.etudes.ru/.data/etudes/angle-trisection/02@hd.jpg</image:loc>
      <image:title><![CDATA[La trisezione dell’angolo]]></image:title>
    </image:image>
    <image:image>
      <image:loc>https://it.etudes.ru/.data/etudes/angle-trisection/02.jpg</image:loc>
      <image:title><![CDATA[La trisezione dell’angolo]]></image:title>
    </image:image>
    <image:image>
      <image:loc>https://it.etudes.ru/.data/etudes/angle-trisection/03@fhd.jpg</image:loc>
      <image:title><![CDATA[La trisezione dell’angolo]]></image:title>
    </image:image>
    <image:image>
      <image:loc>https://it.etudes.ru/.data/etudes/angle-trisection/03@hd.jpg</image:loc>
      <image:title><![CDATA[La trisezione dell’angolo]]></image:title>
    </image:image>
    <image:image>
      <image:loc>https://it.etudes.ru/.data/etudes/angle-trisection/03.jpg</image:loc>
      <image:title><![CDATA[La trisezione dell’angolo]]></image:title>
    </image:image>
    <image:image>
      <image:loc>https://it.etudes.ru/.data/etudes/angle-trisection/04@fhd.jpg</image:loc>
      <image:title><![CDATA[La trisezione dell’angolo]]></image:title>
    </image:image>
    <image:image>
      <image:loc>https://it.etudes.ru/.data/etudes/angle-trisection/04@hd.jpg</image:loc>
      <image:title><![CDATA[La trisezione dell’angolo]]></image:title>
    </image:image>
    <image:image>
      <image:loc>https://it.etudes.ru/.data/etudes/angle-trisection/04.jpg</image:loc>
      <image:title><![CDATA[La trisezione dell’angolo]]></image:title>
    </image:image>
    <image:image>
      <image:loc>https://it.etudes.ru/.data/etudes/angle-trisection/05@fhd.jpg</image:loc>
      <image:title><![CDATA[La trisezione dell’angolo]]></image:title>
    </image:image>
    <image:image>
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      <video:duration>377</video:duration>
    </video:video>
  </url>
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    <lastmod>2008-02-21</lastmod>
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    <image:image>
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      <video:duration>377</video:duration>
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    <lastmod>2008-01-11</lastmod>
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      <video:duration>377</video:duration>
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    <lastmod>2007-12-13</lastmod>
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    <loc>https://it.etudes.ru/etudes/tchebyshev-plantigrade-machine/</loc>
    <lastmod>2007-12-04</lastmod>
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    </image:image>
    <image:image>
      <image:loc>https://it.etudes.ru/.data/etudes/tchebyshev-plantigrade-machine/08@fhd.jpg</image:loc>
      <image:title><![CDATA[Macchina plantigrada]]></image:title>
    </image:image>
    <image:image>
      <image:loc>https://it.etudes.ru/.data/etudes/tchebyshev-plantigrade-machine/08@hd.jpg</image:loc>
      <image:title><![CDATA[Macchina plantigrada]]></image:title>
    </image:image>
    <image:image>
      <image:loc>https://it.etudes.ru/.data/etudes/tchebyshev-plantigrade-machine/08.jpg</image:loc>
      <image:title><![CDATA[Macchina plantigrada]]></image:title>
    </image:image>
    <image:image>
      <image:loc>https://it.etudes.ru/.data/etudes/tchebyshev-plantigrade-machine/09@fhd.jpg</image:loc>
      <image:title><![CDATA[Macchina plantigrada]]></image:title>
    </image:image>
    <image:image>
      <image:loc>https://it.etudes.ru/.data/etudes/tchebyshev-plantigrade-machine/09@hd.jpg</image:loc>
      <image:title><![CDATA[Macchina plantigrada]]></image:title>
    </image:image>
    <image:image>
      <image:loc>https://it.etudes.ru/.data/etudes/tchebyshev-plantigrade-machine/09.jpg</image:loc>
      <image:title><![CDATA[Macchina plantigrada]]></image:title>
    </image:image>
    <image:image>
      <image:loc>https://it.etudes.ru/.data/etudes/tchebyshev-plantigrade-machine/10@fhd.jpg</image:loc>
      <image:title><![CDATA[Macchina plantigrada]]></image:title>
    </image:image>
    <image:image>
      <image:loc>https://it.etudes.ru/.data/etudes/tchebyshev-plantigrade-machine/10@hd.jpg</image:loc>
      <image:title><![CDATA[Macchina plantigrada]]></image:title>
    </image:image>
    <image:image>
      <image:loc>https://it.etudes.ru/.data/etudes/tchebyshev-plantigrade-machine/10.jpg</image:loc>
      <image:title><![CDATA[Macchina plantigrada]]></image:title>
    </image:image>
    <video:video>
      <video:content_loc>https://it.etudes.ru/.data/video/TchebRu_plantigrade-machine@fhd.mp4</video:content_loc>
      <video:thumbnail_loc>https://it.etudes.ru/.data/etudes/tchebyshev-plantigrade-machine/thumb@fhd.jpg</video:thumbnail_loc>
      <video:title><![CDATA[Macchina plantigrada]]></video:title>
      <video:description><![CDATA[Pensate che le auto a piedi siano una cosa del lontano futuro, il tempo di Star Wars di Lucas? Sbagliato! La prima macchina del genere fu inventata nella seconda metà del XIX secolo dal matematico russo P. L. Tchebyshev.]]></video:description>
      <video:duration>175</video:duration>
    </video:video>
  </url>
  <url>
    <loc>https://it.etudes.ru/etudes/durer-conjecture/</loc>
    <lastmod>2007-06-19</lastmod>
    <image:image>
      <image:loc>https://it.etudes.ru/.data/etudes/durer-conjecture/01@fhd.jpg</image:loc>
      <image:title><![CDATA[Anti-Durer]]></image:title>
    </image:image>
    <image:image>
      <image:loc>https://it.etudes.ru/.data/etudes/durer-conjecture/01@hd.jpg</image:loc>
      <image:title><![CDATA[Anti-Durer]]></image:title>
    </image:image>
    <image:image>
      <image:loc>https://it.etudes.ru/.data/etudes/durer-conjecture/01.jpg</image:loc>
      <image:title><![CDATA[Anti-Durer]]></image:title>
    </image:image>
    <image:image>
      <image:loc>https://it.etudes.ru/.data/etudes/durer-conjecture/02@fhd.jpg</image:loc>
      <image:title><![CDATA[Anti-Durer]]></image:title>
    </image:image>
    <image:image>
      <image:loc>https://it.etudes.ru/.data/etudes/durer-conjecture/02@hd.jpg</image:loc>
      <image:title><![CDATA[Anti-Durer]]></image:title>
    </image:image>
    <image:image>
      <image:loc>https://it.etudes.ru/.data/etudes/durer-conjecture/02.jpg</image:loc>
      <image:title><![CDATA[Anti-Durer]]></image:title>
    </image:image>
    <image:image>
      <image:loc>https://it.etudes.ru/.data/etudes/durer-conjecture/03@fhd.jpg</image:loc>
      <image:title><![CDATA[Anti-Durer]]></image:title>
    </image:image>
    <image:image>
      <image:loc>https://it.etudes.ru/.data/etudes/durer-conjecture/03@hd.jpg</image:loc>
      <image:title><![CDATA[Anti-Durer]]></image:title>
    </image:image>
    <image:image>
      <image:loc>https://it.etudes.ru/.data/etudes/durer-conjecture/03.jpg</image:loc>
      <image:title><![CDATA[Anti-Durer]]></image:title>
    </image:image>
    <image:image>
      <image:loc>https://it.etudes.ru/.data/etudes/durer-conjecture/04@fhd.jpg</image:loc>
      <image:title><![CDATA[Anti-Durer]]></image:title>
    </image:image>
    <image:image>
      <image:loc>https://it.etudes.ru/.data/etudes/durer-conjecture/04@hd.jpg</image:loc>
      <image:title><![CDATA[Anti-Durer]]></image:title>
    </image:image>
    <image:image>
      <image:loc>https://it.etudes.ru/.data/etudes/durer-conjecture/04.jpg</image:loc>
      <image:title><![CDATA[Anti-Durer]]></image:title>
    </image:image>
    <image:image>
      <image:loc>https://it.etudes.ru/.data/etudes/durer-conjecture/05@fhd.jpg</image:loc>
      <image:title><![CDATA[Anti-Durer]]></image:title>
    </image:image>
    <image:image>
      <image:loc>https://it.etudes.ru/.data/etudes/durer-conjecture/05@hd.jpg</image:loc>
      <image:title><![CDATA[Anti-Durer]]></image:title>
    </image:image>
    <image:image>
      <image:loc>https://it.etudes.ru/.data/etudes/durer-conjecture/05.jpg</image:loc>
      <image:title><![CDATA[Anti-Durer]]></image:title>
    </image:image>
    <image:image>
      <image:loc>https://it.etudes.ru/.data/etudes/durer-conjecture/06@fhd.jpg</image:loc>
      <image:title><![CDATA[Anti-Durer]]></image:title>
    </image:image>
    <image:image>
      <image:loc>https://it.etudes.ru/.data/etudes/durer-conjecture/06@hd.jpg</image:loc>
      <image:title><![CDATA[Anti-Durer]]></image:title>
    </image:image>
    <image:image>
      <image:loc>https://it.etudes.ru/.data/etudes/durer-conjecture/06.jpg</image:loc>
      <image:title><![CDATA[Anti-Durer]]></image:title>
    </image:image>
    <image:image>
      <image:loc>https://it.etudes.ru/.data/etudes/durer-conjecture/07@fhd.jpg</image:loc>
      <image:title><![CDATA[Anti-Durer]]></image:title>
    </image:image>
    <image:image>
      <image:loc>https://it.etudes.ru/.data/etudes/durer-conjecture/07@hd.jpg</image:loc>
      <image:title><![CDATA[Anti-Durer]]></image:title>
    </image:image>
    <image:image>
      <image:loc>https://it.etudes.ru/.data/etudes/durer-conjecture/07.jpg</image:loc>
      <image:title><![CDATA[Anti-Durer]]></image:title>
    </image:image>
    <image:image>
      <image:loc>https://it.etudes.ru/.data/etudes/durer-conjecture/08@fhd.jpg</image:loc>
      <image:title><![CDATA[Anti-Durer]]></image:title>
    </image:image>
    <image:image>
      <image:loc>https://it.etudes.ru/.data/etudes/durer-conjecture/08@hd.jpg</image:loc>
      <image:title><![CDATA[Anti-Durer]]></image:title>
    </image:image>
    <image:image>
      <image:loc>https://it.etudes.ru/.data/etudes/durer-conjecture/08.jpg</image:loc>
      <image:title><![CDATA[Anti-Durer]]></image:title>
    </image:image>
    <image:image>
      <image:loc>https://it.etudes.ru/.data/etudes/durer-conjecture/09@fhd.jpg</image:loc>
      <image:title><![CDATA[Anti-Durer]]></image:title>
    </image:image>
    <image:image>
      <image:loc>https://it.etudes.ru/.data/etudes/durer-conjecture/09@hd.jpg</image:loc>
      <image:title><![CDATA[Anti-Durer]]></image:title>
    </image:image>
    <image:image>
      <image:loc>https://it.etudes.ru/.data/etudes/durer-conjecture/09.jpg</image:loc>
      <image:title><![CDATA[Anti-Durer]]></image:title>
    </image:image>
    <image:image>
      <image:loc>https://it.etudes.ru/.data/etudes/durer-conjecture/10@fhd.jpg</image:loc>
      <image:title><![CDATA[Anti-Durer]]></image:title>
    </image:image>
    <image:image>
      <image:loc>https://it.etudes.ru/.data/etudes/durer-conjecture/10@hd.jpg</image:loc>
      <image:title><![CDATA[Anti-Durer]]></image:title>
    </image:image>
    <image:image>
      <image:loc>https://it.etudes.ru/.data/etudes/durer-conjecture/10.jpg</image:loc>
      <image:title><![CDATA[Anti-Durer]]></image:title>
    </image:image>
    <image:image>
      <image:loc>https://it.etudes.ru/.data/etudes/durer-conjecture/11@fhd.jpg</image:loc>
      <image:title><![CDATA[Anti-Durer]]></image:title>
    </image:image>
    <image:image>
      <image:loc>https://it.etudes.ru/.data/etudes/durer-conjecture/11@hd.jpg</image:loc>
      <image:title><![CDATA[Anti-Durer]]></image:title>
    </image:image>
    <image:image>
      <image:loc>https://it.etudes.ru/.data/etudes/durer-conjecture/11.jpg</image:loc>
      <image:title><![CDATA[Anti-Durer]]></image:title>
    </image:image>
    <video:video>
      <video:content_loc>https://it.etudes.ru/.data/video/EtudesRu_Durer-conjecture@fhd.mp4</video:content_loc>
      <video:thumbnail_loc>https://it.etudes.ru/.data/etudes/durer-conjecture/thumb@fhd.jpg</video:thumbnail_loc>
      <video:title><![CDATA[Anti-Durer]]></video:title>
      <video:description><![CDATA[Eccovi un problema non risolto: trovare un poliedro convesso  di cui ogni sviluppo piano, che consista di un solo pezzo,  abbia qualche sovrapposizione.]]></video:description>
      <video:duration>377</video:duration>
    </video:video>
  </url>
  <url>
    <loc>https://it.etudes.ru/etudes/ray-screening/</loc>
    <lastmod>2007-06-13</lastmod>
    <image:image>
      <image:loc>https://it.etudes.ru/.data/etudes/ray-screening/01@fhd.jpg</image:loc>
      <image:title><![CDATA[Intrappolare i raggi di luce]]></image:title>
    </image:image>
    <image:image>
      <image:loc>https://it.etudes.ru/.data/etudes/ray-screening/01@hd.jpg</image:loc>
      <image:title><![CDATA[Intrappolare i raggi di luce]]></image:title>
    </image:image>
    <image:image>
      <image:loc>https://it.etudes.ru/.data/etudes/ray-screening/01.jpg</image:loc>
      <image:title><![CDATA[Intrappolare i raggi di luce]]></image:title>
    </image:image>
    <image:image>
      <image:loc>https://it.etudes.ru/.data/etudes/ray-screening/02@fhd.jpg</image:loc>
      <image:title><![CDATA[Intrappolare i raggi di luce]]></image:title>
    </image:image>
    <image:image>
      <image:loc>https://it.etudes.ru/.data/etudes/ray-screening/02@hd.jpg</image:loc>
      <image:title><![CDATA[Intrappolare i raggi di luce]]></image:title>
    </image:image>
    <image:image>
      <image:loc>https://it.etudes.ru/.data/etudes/ray-screening/02.jpg</image:loc>
      <image:title><![CDATA[Intrappolare i raggi di luce]]></image:title>
    </image:image>
    <image:image>
      <image:loc>https://it.etudes.ru/.data/etudes/ray-screening/03@fhd.jpg</image:loc>
      <image:title><![CDATA[Intrappolare i raggi di luce]]></image:title>
    </image:image>
    <image:image>
      <image:loc>https://it.etudes.ru/.data/etudes/ray-screening/03@hd.jpg</image:loc>
      <image:title><![CDATA[Intrappolare i raggi di luce]]></image:title>
    </image:image>
    <image:image>
      <image:loc>https://it.etudes.ru/.data/etudes/ray-screening/03.jpg</image:loc>
      <image:title><![CDATA[Intrappolare i raggi di luce]]></image:title>
    </image:image>
    <image:image>
      <image:loc>https://it.etudes.ru/.data/etudes/ray-screening/04@fhd.jpg</image:loc>
      <image:title><![CDATA[Intrappolare i raggi di luce]]></image:title>
    </image:image>
    <image:image>
      <image:loc>https://it.etudes.ru/.data/etudes/ray-screening/04@hd.jpg</image:loc>
      <image:title><![CDATA[Intrappolare i raggi di luce]]></image:title>
    </image:image>
    <image:image>
      <image:loc>https://it.etudes.ru/.data/etudes/ray-screening/04.jpg</image:loc>
      <image:title><![CDATA[Intrappolare i raggi di luce]]></image:title>
    </image:image>
    <image:image>
      <image:loc>https://it.etudes.ru/.data/etudes/ray-screening/05@fhd.jpg</image:loc>
      <image:title><![CDATA[Intrappolare i raggi di luce]]></image:title>
    </image:image>
    <image:image>
      <image:loc>https://it.etudes.ru/.data/etudes/ray-screening/05@hd.jpg</image:loc>
      <image:title><![CDATA[Intrappolare i raggi di luce]]></image:title>
    </image:image>
    <image:image>
      <image:loc>https://it.etudes.ru/.data/etudes/ray-screening/05.jpg</image:loc>
      <image:title><![CDATA[Intrappolare i raggi di luce]]></image:title>
    </image:image>
    <image:image>
      <image:loc>https://it.etudes.ru/.data/etudes/ray-screening/06@fhd.jpg</image:loc>
      <image:title><![CDATA[Intrappolare i raggi di luce]]></image:title>
    </image:image>
    <image:image>
      <image:loc>https://it.etudes.ru/.data/etudes/ray-screening/06@hd.jpg</image:loc>
      <image:title><![CDATA[Intrappolare i raggi di luce]]></image:title>
    </image:image>
    <image:image>
      <image:loc>https://it.etudes.ru/.data/etudes/ray-screening/06.jpg</image:loc>
      <image:title><![CDATA[Intrappolare i raggi di luce]]></image:title>
    </image:image>
    <video:video>
      <video:content_loc>https://it.etudes.ru/.data/video/EtudesRu_ray-screening@fhd.mp4</video:content_loc>
      <video:thumbnail_loc>https://it.etudes.ru/.data/etudes/ray-screening/thumb@fhd.jpg</video:thumbnail_loc>
      <video:title><![CDATA[Intrappolare i raggi di luce]]></video:title>
      <video:description><![CDATA[E’ possibile intrappolare  dei raggi di luce, che si propagano nel piano, per mezzo di  colonne cilindriche riflettenti?]]></video:description>
      <video:duration>377</video:duration>
    </video:video>
  </url>
  <url>
    <loc>https://it.etudes.ru/etudes/corner-reflector/</loc>
    <lastmod>2007-05-13</lastmod>
    <image:image>
      <image:loc>https://it.etudes.ru/.data/etudes/corner-reflector/01@fhd.jpg</image:loc>
      <image:title><![CDATA[Specchi angolari]]></image:title>
    </image:image>
    <image:image>
      <image:loc>https://it.etudes.ru/.data/etudes/corner-reflector/01@hd.jpg</image:loc>
      <image:title><![CDATA[Specchi angolari]]></image:title>
    </image:image>
    <image:image>
      <image:loc>https://it.etudes.ru/.data/etudes/corner-reflector/01.jpg</image:loc>
      <image:title><![CDATA[Specchi angolari]]></image:title>
    </image:image>
    <image:image>
      <image:loc>https://it.etudes.ru/.data/etudes/corner-reflector/02@fhd.jpg</image:loc>
      <image:title><![CDATA[Specchi angolari]]></image:title>
    </image:image>
    <image:image>
      <image:loc>https://it.etudes.ru/.data/etudes/corner-reflector/02@hd.jpg</image:loc>
      <image:title><![CDATA[Specchi angolari]]></image:title>
    </image:image>
    <image:image>
      <image:loc>https://it.etudes.ru/.data/etudes/corner-reflector/02.jpg</image:loc>
      <image:title><![CDATA[Specchi angolari]]></image:title>
    </image:image>
    <image:image>
      <image:loc>https://it.etudes.ru/.data/etudes/corner-reflector/03@fhd.jpg</image:loc>
      <image:title><![CDATA[Specchi angolari]]></image:title>
    </image:image>
    <image:image>
      <image:loc>https://it.etudes.ru/.data/etudes/corner-reflector/03@hd.jpg</image:loc>
      <image:title><![CDATA[Specchi angolari]]></image:title>
    </image:image>
    <image:image>
      <image:loc>https://it.etudes.ru/.data/etudes/corner-reflector/03.jpg</image:loc>
      <image:title><![CDATA[Specchi angolari]]></image:title>
    </image:image>
    <image:image>
      <image:loc>https://it.etudes.ru/.data/etudes/corner-reflector/04@fhd.jpg</image:loc>
      <image:title><![CDATA[Specchi angolari]]></image:title>
    </image:image>
    <image:image>
      <image:loc>https://it.etudes.ru/.data/etudes/corner-reflector/04@hd.jpg</image:loc>
      <image:title><![CDATA[Specchi angolari]]></image:title>
    </image:image>
    <image:image>
      <image:loc>https://it.etudes.ru/.data/etudes/corner-reflector/04.jpg</image:loc>
      <image:title><![CDATA[Specchi angolari]]></image:title>
    </image:image>
    <image:image>
      <image:loc>https://it.etudes.ru/.data/etudes/corner-reflector/05@fhd.jpg</image:loc>
      <image:title><![CDATA[Specchi angolari]]></image:title>
    </image:image>
    <image:image>
      <image:loc>https://it.etudes.ru/.data/etudes/corner-reflector/05@hd.jpg</image:loc>
      <image:title><![CDATA[Specchi angolari]]></image:title>
    </image:image>
    <image:image>
      <image:loc>https://it.etudes.ru/.data/etudes/corner-reflector/05.jpg</image:loc>
      <image:title><![CDATA[Specchi angolari]]></image:title>
    </image:image>
    <image:image>
      <image:loc>https://it.etudes.ru/.data/etudes/corner-reflector/06@fhd.jpg</image:loc>
      <image:title><![CDATA[Specchi angolari]]></image:title>
    </image:image>
    <image:image>
      <image:loc>https://it.etudes.ru/.data/etudes/corner-reflector/06@hd.jpg</image:loc>
      <image:title><![CDATA[Specchi angolari]]></image:title>
    </image:image>
    <image:image>
      <image:loc>https://it.etudes.ru/.data/etudes/corner-reflector/06.jpg</image:loc>
      <image:title><![CDATA[Specchi angolari]]></image:title>
    </image:image>
    <image:image>
      <image:loc>https://it.etudes.ru/.data/etudes/corner-reflector/07@fhd.jpg</image:loc>
      <image:title><![CDATA[Specchi angolari]]></image:title>
    </image:image>
    <image:image>
      <image:loc>https://it.etudes.ru/.data/etudes/corner-reflector/07@hd.jpg</image:loc>
      <image:title><![CDATA[Specchi angolari]]></image:title>
    </image:image>
    <image:image>
      <image:loc>https://it.etudes.ru/.data/etudes/corner-reflector/07.jpg</image:loc>
      <image:title><![CDATA[Specchi angolari]]></image:title>
    </image:image>
    <image:image>
      <image:loc>https://it.etudes.ru/.data/etudes/corner-reflector/08@fhd.jpg</image:loc>
      <image:title><![CDATA[Specchi angolari]]></image:title>
    </image:image>
    <image:image>
      <image:loc>https://it.etudes.ru/.data/etudes/corner-reflector/08@hd.jpg</image:loc>
      <image:title><![CDATA[Specchi angolari]]></image:title>
    </image:image>
    <image:image>
      <image:loc>https://it.etudes.ru/.data/etudes/corner-reflector/08.jpg</image:loc>
      <image:title><![CDATA[Specchi angolari]]></image:title>
    </image:image>
    <image:image>
      <image:loc>https://it.etudes.ru/.data/etudes/corner-reflector/09@fhd.jpg</image:loc>
      <image:title><![CDATA[Specchi angolari]]></image:title>
    </image:image>
    <image:image>
      <image:loc>https://it.etudes.ru/.data/etudes/corner-reflector/09@hd.jpg</image:loc>
      <image:title><![CDATA[Specchi angolari]]></image:title>
    </image:image>
    <image:image>
      <image:loc>https://it.etudes.ru/.data/etudes/corner-reflector/09.jpg</image:loc>
      <image:title><![CDATA[Specchi angolari]]></image:title>
    </image:image>
    <video:video>
      <video:content_loc>https://it.etudes.ru/.data/video/EtudesRu_corner-reflector@fhd.mp4</video:content_loc>
      <video:thumbnail_loc>https://it.etudes.ru/.data/etudes/corner-reflector/thumb@fhd.jpg</video:thumbnail_loc>
      <video:title><![CDATA[Specchi angolari]]></video:title>
      <video:description><![CDATA[Cosa hanno in comune una bicicletta e il Lunokhod? Perché i catarifrangenti della bicicletta sono visibili di notte solo per il conducente dell’auto auto i cui fari li illuminano, e non sono visibile agli altri?]]></video:description>
      <video:duration>377</video:duration>
    </video:video>
  </url>
  <url>
    <loc>https://it.etudes.ru/etudes/geodesic/</loc>
    <lastmod>2007-05-11</lastmod>
    <image:image>
      <image:loc>https://it.etudes.ru/.data/etudes/geodesic/01@fhd.jpg</image:loc>
      <image:title><![CDATA[Il percorso più breve]]></image:title>
    </image:image>
    <image:image>
      <image:loc>https://it.etudes.ru/.data/etudes/geodesic/01@hd.jpg</image:loc>
      <image:title><![CDATA[Il percorso più breve]]></image:title>
    </image:image>
    <image:image>
      <image:loc>https://it.etudes.ru/.data/etudes/geodesic/01.jpg</image:loc>
      <image:title><![CDATA[Il percorso più breve]]></image:title>
    </image:image>
    <image:image>
      <image:loc>https://it.etudes.ru/.data/etudes/geodesic/02@fhd.jpg</image:loc>
      <image:title><![CDATA[Il percorso più breve]]></image:title>
    </image:image>
    <image:image>
      <image:loc>https://it.etudes.ru/.data/etudes/geodesic/02@hd.jpg</image:loc>
      <image:title><![CDATA[Il percorso più breve]]></image:title>
    </image:image>
    <image:image>
      <image:loc>https://it.etudes.ru/.data/etudes/geodesic/02.jpg</image:loc>
      <image:title><![CDATA[Il percorso più breve]]></image:title>
    </image:image>
    <image:image>
      <image:loc>https://it.etudes.ru/.data/etudes/geodesic/03@fhd.jpg</image:loc>
      <image:title><![CDATA[Il percorso più breve]]></image:title>
    </image:image>
    <image:image>
      <image:loc>https://it.etudes.ru/.data/etudes/geodesic/03@hd.jpg</image:loc>
      <image:title><![CDATA[Il percorso più breve]]></image:title>
    </image:image>
    <image:image>
      <image:loc>https://it.etudes.ru/.data/etudes/geodesic/03.jpg</image:loc>
      <image:title><![CDATA[Il percorso più breve]]></image:title>
    </image:image>
    <image:image>
      <image:loc>https://it.etudes.ru/.data/etudes/geodesic/04@fhd.jpg</image:loc>
      <image:title><![CDATA[Il percorso più breve]]></image:title>
    </image:image>
    <image:image>
      <image:loc>https://it.etudes.ru/.data/etudes/geodesic/04@hd.jpg</image:loc>
      <image:title><![CDATA[Il percorso più breve]]></image:title>
    </image:image>
    <image:image>
      <image:loc>https://it.etudes.ru/.data/etudes/geodesic/04.jpg</image:loc>
      <image:title><![CDATA[Il percorso più breve]]></image:title>
    </image:image>
    <image:image>
      <image:loc>https://it.etudes.ru/.data/etudes/geodesic/05@fhd.jpg</image:loc>
      <image:title><![CDATA[Il percorso più breve]]></image:title>
    </image:image>
    <image:image>
      <image:loc>https://it.etudes.ru/.data/etudes/geodesic/05@hd.jpg</image:loc>
      <image:title><![CDATA[Il percorso più breve]]></image:title>
    </image:image>
    <image:image>
      <image:loc>https://it.etudes.ru/.data/etudes/geodesic/05.jpg</image:loc>
      <image:title><![CDATA[Il percorso più breve]]></image:title>
    </image:image>
    <image:image>
      <image:loc>https://it.etudes.ru/.data/etudes/geodesic/06@fhd.jpg</image:loc>
      <image:title><![CDATA[Il percorso più breve]]></image:title>
    </image:image>
    <image:image>
      <image:loc>https://it.etudes.ru/.data/etudes/geodesic/06@hd.jpg</image:loc>
      <image:title><![CDATA[Il percorso più breve]]></image:title>
    </image:image>
    <image:image>
      <image:loc>https://it.etudes.ru/.data/etudes/geodesic/06.jpg</image:loc>
      <image:title><![CDATA[Il percorso più breve]]></image:title>
    </image:image>
    <video:video>
      <video:content_loc>https://it.etudes.ru/.data/video/EtudesRu_geodesic@fhd.mp4</video:content_loc>
      <video:thumbnail_loc>https://it.etudes.ru/.data/etudes/geodesic/thumb@fhd.jpg</video:thumbnail_loc>
      <video:title><![CDATA[Il percorso più breve]]></video:title>
      <video:description><![CDATA[Volando da Mosca a Vladivostok, gli aerei fanno una rotta che passa molto a nord, guardando sulla carta. Perché fare un giro simile, e non andare in linea retta?]]></video:description>
      <video:duration>377</video:duration>
    </video:video>
  </url>
  <url>
    <loc>https://it.etudes.ru/etudes/drilling-square-holes/</loc>
    <lastmod>2007-02-05</lastmod>
    <image:image>
      <image:loc>https://it.etudes.ru/.data/etudes/drilling-square-holes/01@fhd.jpg</image:loc>
      <image:title><![CDATA[Fare dei fori quadrati]]></image:title>
    </image:image>
    <image:image>
      <image:loc>https://it.etudes.ru/.data/etudes/drilling-square-holes/01@hd.jpg</image:loc>
      <image:title><![CDATA[Fare dei fori quadrati]]></image:title>
    </image:image>
    <image:image>
      <image:loc>https://it.etudes.ru/.data/etudes/drilling-square-holes/01.jpg</image:loc>
      <image:title><![CDATA[Fare dei fori quadrati]]></image:title>
    </image:image>
    <image:image>
      <image:loc>https://it.etudes.ru/.data/etudes/drilling-square-holes/02@fhd.jpg</image:loc>
      <image:title><![CDATA[Fare dei fori quadrati]]></image:title>
    </image:image>
    <image:image>
      <image:loc>https://it.etudes.ru/.data/etudes/drilling-square-holes/02@hd.jpg</image:loc>
      <image:title><![CDATA[Fare dei fori quadrati]]></image:title>
    </image:image>
    <image:image>
      <image:loc>https://it.etudes.ru/.data/etudes/drilling-square-holes/02.jpg</image:loc>
      <image:title><![CDATA[Fare dei fori quadrati]]></image:title>
    </image:image>
    <image:image>
      <image:loc>https://it.etudes.ru/.data/etudes/drilling-square-holes/03@fhd.jpg</image:loc>
      <image:title><![CDATA[Fare dei fori quadrati]]></image:title>
    </image:image>
    <image:image>
      <image:loc>https://it.etudes.ru/.data/etudes/drilling-square-holes/03@hd.jpg</image:loc>
      <image:title><![CDATA[Fare dei fori quadrati]]></image:title>
    </image:image>
    <image:image>
      <image:loc>https://it.etudes.ru/.data/etudes/drilling-square-holes/03.jpg</image:loc>
      <image:title><![CDATA[Fare dei fori quadrati]]></image:title>
    </image:image>
    <image:image>
      <image:loc>https://it.etudes.ru/.data/etudes/drilling-square-holes/04@fhd.jpg</image:loc>
      <image:title><![CDATA[Fare dei fori quadrati]]></image:title>
    </image:image>
    <image:image>
      <image:loc>https://it.etudes.ru/.data/etudes/drilling-square-holes/04@hd.jpg</image:loc>
      <image:title><![CDATA[Fare dei fori quadrati]]></image:title>
    </image:image>
    <image:image>
      <image:loc>https://it.etudes.ru/.data/etudes/drilling-square-holes/04.jpg</image:loc>
      <image:title><![CDATA[Fare dei fori quadrati]]></image:title>
    </image:image>
    <image:image>
      <image:loc>https://it.etudes.ru/.data/etudes/drilling-square-holes/05@fhd.jpg</image:loc>
      <image:title><![CDATA[Fare dei fori quadrati]]></image:title>
    </image:image>
    <image:image>
      <image:loc>https://it.etudes.ru/.data/etudes/drilling-square-holes/05@hd.jpg</image:loc>
      <image:title><![CDATA[Fare dei fori quadrati]]></image:title>
    </image:image>
    <image:image>
      <image:loc>https://it.etudes.ru/.data/etudes/drilling-square-holes/05.jpg</image:loc>
      <image:title><![CDATA[Fare dei fori quadrati]]></image:title>
    </image:image>
    <image:image>
      <image:loc>https://it.etudes.ru/.data/etudes/drilling-square-holes/06@fhd.jpg</image:loc>
      <image:title><![CDATA[Fare dei fori quadrati]]></image:title>
    </image:image>
    <image:image>
      <image:loc>https://it.etudes.ru/.data/etudes/drilling-square-holes/06@hd.jpg</image:loc>
      <image:title><![CDATA[Fare dei fori quadrati]]></image:title>
    </image:image>
    <image:image>
      <image:loc>https://it.etudes.ru/.data/etudes/drilling-square-holes/06.jpg</image:loc>
      <image:title><![CDATA[Fare dei fori quadrati]]></image:title>
    </image:image>
    <image:image>
      <image:loc>https://it.etudes.ru/.data/etudes/drilling-square-holes/07@fhd.jpg</image:loc>
      <image:title><![CDATA[Fare dei fori quadrati]]></image:title>
    </image:image>
    <image:image>
      <image:loc>https://it.etudes.ru/.data/etudes/drilling-square-holes/07@hd.jpg</image:loc>
      <image:title><![CDATA[Fare dei fori quadrati]]></image:title>
    </image:image>
    <image:image>
      <image:loc>https://it.etudes.ru/.data/etudes/drilling-square-holes/07.jpg</image:loc>
      <image:title><![CDATA[Fare dei fori quadrati]]></image:title>
    </image:image>
    <image:image>
      <image:loc>https://it.etudes.ru/.data/etudes/drilling-square-holes/08@fhd.jpg</image:loc>
      <image:title><![CDATA[Fare dei fori quadrati]]></image:title>
    </image:image>
    <image:image>
      <image:loc>https://it.etudes.ru/.data/etudes/drilling-square-holes/08@hd.jpg</image:loc>
      <image:title><![CDATA[Fare dei fori quadrati]]></image:title>
    </image:image>
    <image:image>
      <image:loc>https://it.etudes.ru/.data/etudes/drilling-square-holes/08.jpg</image:loc>
      <image:title><![CDATA[Fare dei fori quadrati]]></image:title>
    </image:image>
    <image:image>
      <image:loc>https://it.etudes.ru/.data/etudes/drilling-square-holes/09@fhd.jpg</image:loc>
      <image:title><![CDATA[Fare dei fori quadrati]]></image:title>
    </image:image>
    <image:image>
      <image:loc>https://it.etudes.ru/.data/etudes/drilling-square-holes/09@hd.jpg</image:loc>
      <image:title><![CDATA[Fare dei fori quadrati]]></image:title>
    </image:image>
    <image:image>
      <image:loc>https://it.etudes.ru/.data/etudes/drilling-square-holes/09.jpg</image:loc>
      <image:title><![CDATA[Fare dei fori quadrati]]></image:title>
    </image:image>
    <image:image>
      <image:loc>https://it.etudes.ru/.data/etudes/drilling-square-holes/10@fhd.jpg</image:loc>
      <image:title><![CDATA[Fare dei fori quadrati]]></image:title>
    </image:image>
    <image:image>
      <image:loc>https://it.etudes.ru/.data/etudes/drilling-square-holes/10@hd.jpg</image:loc>
      <image:title><![CDATA[Fare dei fori quadrati]]></image:title>
    </image:image>
    <image:image>
      <image:loc>https://it.etudes.ru/.data/etudes/drilling-square-holes/10.jpg</image:loc>
      <image:title><![CDATA[Fare dei fori quadrati]]></image:title>
    </image:image>
    <image:image>
      <image:loc>https://it.etudes.ru/.data/etudes/drilling-square-holes/11@fhd.jpg</image:loc>
      <image:title><![CDATA[Fare dei fori quadrati]]></image:title>
    </image:image>
    <image:image>
      <image:loc>https://it.etudes.ru/.data/etudes/drilling-square-holes/11@hd.jpg</image:loc>
      <image:title><![CDATA[Fare dei fori quadrati]]></image:title>
    </image:image>
    <image:image>
      <image:loc>https://it.etudes.ru/.data/etudes/drilling-square-holes/11.jpg</image:loc>
      <image:title><![CDATA[Fare dei fori quadrati]]></image:title>
    </image:image>
    <image:image>
      <image:loc>https://it.etudes.ru/.data/etudes/drilling-square-holes/12@fhd.jpg</image:loc>
      <image:title><![CDATA[Fare dei fori quadrati]]></image:title>
    </image:image>
    <image:image>
      <image:loc>https://it.etudes.ru/.data/etudes/drilling-square-holes/12@hd.jpg</image:loc>
      <image:title><![CDATA[Fare dei fori quadrati]]></image:title>
    </image:image>
    <image:image>
      <image:loc>https://it.etudes.ru/.data/etudes/drilling-square-holes/12.jpg</image:loc>
      <image:title><![CDATA[Fare dei fori quadrati]]></image:title>
    </image:image>
    <video:video>
      <video:content_loc>https://it.etudes.ru/.data/video/EtudesRu_drilling-square-holes@fhd.mp4</video:content_loc>
      <video:thumbnail_loc>https://it.etudes.ru/.data/etudes/drilling-square-holes/thumb@fhd.jpg</video:thumbnail_loc>
      <video:title><![CDATA[Fare dei fori quadrati]]></video:title>
      <video:description><![CDATA[Si possono fare col trapano dei buchi non solo circolari, ma anche quadrati! Occorre soltanto una punta speciale. Quale punta precisamente lo saprete guardando questo filmato.]]></video:description>
      <video:duration>377</video:duration>
    </video:video>
  </url>
  <url>
    <loc>https://it.etudes.ru/etudes/polyhedra-development/</loc>
    <lastmod>2006-12-09</lastmod>
    <image:image>
      <image:loc>https://it.etudes.ru/.data/etudes/polyhedra-development/01@fhd.jpg</image:loc>
      <image:title><![CDATA[E quest’altro sviluppo?!]]></image:title>
    </image:image>
    <image:image>
      <image:loc>https://it.etudes.ru/.data/etudes/polyhedra-development/01@hd.jpg</image:loc>
      <image:title><![CDATA[E quest’altro sviluppo?!]]></image:title>
    </image:image>
    <image:image>
      <image:loc>https://it.etudes.ru/.data/etudes/polyhedra-development/01.jpg</image:loc>
      <image:title><![CDATA[E quest’altro sviluppo?!]]></image:title>
    </image:image>
    <image:image>
      <image:loc>https://it.etudes.ru/.data/etudes/polyhedra-development/02@fhd.jpg</image:loc>
      <image:title><![CDATA[E quest’altro sviluppo?!]]></image:title>
    </image:image>
    <image:image>
      <image:loc>https://it.etudes.ru/.data/etudes/polyhedra-development/02@hd.jpg</image:loc>
      <image:title><![CDATA[E quest’altro sviluppo?!]]></image:title>
    </image:image>
    <image:image>
      <image:loc>https://it.etudes.ru/.data/etudes/polyhedra-development/02.jpg</image:loc>
      <image:title><![CDATA[E quest’altro sviluppo?!]]></image:title>
    </image:image>
    <image:image>
      <image:loc>https://it.etudes.ru/.data/etudes/polyhedra-development/03@fhd.jpg</image:loc>
      <image:title><![CDATA[E quest’altro sviluppo?!]]></image:title>
    </image:image>
    <image:image>
      <image:loc>https://it.etudes.ru/.data/etudes/polyhedra-development/03@hd.jpg</image:loc>
      <image:title><![CDATA[E quest’altro sviluppo?!]]></image:title>
    </image:image>
    <image:image>
      <image:loc>https://it.etudes.ru/.data/etudes/polyhedra-development/03.jpg</image:loc>
      <image:title><![CDATA[E quest’altro sviluppo?!]]></image:title>
    </image:image>
    <image:image>
      <image:loc>https://it.etudes.ru/.data/etudes/polyhedra-development/04@fhd.jpg</image:loc>
      <image:title><![CDATA[E quest’altro sviluppo?!]]></image:title>
    </image:image>
    <image:image>
      <image:loc>https://it.etudes.ru/.data/etudes/polyhedra-development/04@hd.jpg</image:loc>
      <image:title><![CDATA[E quest’altro sviluppo?!]]></image:title>
    </image:image>
    <image:image>
      <image:loc>https://it.etudes.ru/.data/etudes/polyhedra-development/04.jpg</image:loc>
      <image:title><![CDATA[E quest’altro sviluppo?!]]></image:title>
    </image:image>
    <image:image>
      <image:loc>https://it.etudes.ru/.data/etudes/polyhedra-development/05@fhd.jpg</image:loc>
      <image:title><![CDATA[E quest’altro sviluppo?!]]></image:title>
    </image:image>
    <image:image>
      <image:loc>https://it.etudes.ru/.data/etudes/polyhedra-development/05@hd.jpg</image:loc>
      <image:title><![CDATA[E quest’altro sviluppo?!]]></image:title>
    </image:image>
    <image:image>
      <image:loc>https://it.etudes.ru/.data/etudes/polyhedra-development/05.jpg</image:loc>
      <image:title><![CDATA[E quest’altro sviluppo?!]]></image:title>
    </image:image>
    <image:image>
      <image:loc>https://it.etudes.ru/.data/etudes/polyhedra-development/06@fhd.jpg</image:loc>
      <image:title><![CDATA[E quest’altro sviluppo?!]]></image:title>
    </image:image>
    <image:image>
      <image:loc>https://it.etudes.ru/.data/etudes/polyhedra-development/06@hd.jpg</image:loc>
      <image:title><![CDATA[E quest’altro sviluppo?!]]></image:title>
    </image:image>
    <image:image>
      <image:loc>https://it.etudes.ru/.data/etudes/polyhedra-development/06.jpg</image:loc>
      <image:title><![CDATA[E quest’altro sviluppo?!]]></image:title>
    </image:image>
    <image:image>
      <image:loc>https://it.etudes.ru/.data/etudes/polyhedra-development/07@fhd.jpg</image:loc>
      <image:title><![CDATA[E quest’altro sviluppo?!]]></image:title>
    </image:image>
    <image:image>
      <image:loc>https://it.etudes.ru/.data/etudes/polyhedra-development/07@hd.jpg</image:loc>
      <image:title><![CDATA[E quest’altro sviluppo?!]]></image:title>
    </image:image>
    <image:image>
      <image:loc>https://it.etudes.ru/.data/etudes/polyhedra-development/07.jpg</image:loc>
      <image:title><![CDATA[E quest’altro sviluppo?!]]></image:title>
    </image:image>
    <image:image>
      <image:loc>https://it.etudes.ru/.data/etudes/polyhedra-development/08@fhd.jpg</image:loc>
      <image:title><![CDATA[E quest’altro sviluppo?!]]></image:title>
    </image:image>
    <image:image>
      <image:loc>https://it.etudes.ru/.data/etudes/polyhedra-development/08@hd.jpg</image:loc>
      <image:title><![CDATA[E quest’altro sviluppo?!]]></image:title>
    </image:image>
    <image:image>
      <image:loc>https://it.etudes.ru/.data/etudes/polyhedra-development/08.jpg</image:loc>
      <image:title><![CDATA[E quest’altro sviluppo?!]]></image:title>
    </image:image>
    <image:image>
      <image:loc>https://it.etudes.ru/.data/etudes/polyhedra-development/09@fhd.jpg</image:loc>
      <image:title><![CDATA[E quest’altro sviluppo?!]]></image:title>
    </image:image>
    <image:image>
      <image:loc>https://it.etudes.ru/.data/etudes/polyhedra-development/09@hd.jpg</image:loc>
      <image:title><![CDATA[E quest’altro sviluppo?!]]></image:title>
    </image:image>
    <image:image>
      <image:loc>https://it.etudes.ru/.data/etudes/polyhedra-development/09.jpg</image:loc>
      <image:title><![CDATA[E quest’altro sviluppo?!]]></image:title>
    </image:image>
    <video:video>
      <video:content_loc>https://it.etudes.ru/.data/video/EtudesRu_polyhedra-development@fhd.mp4</video:content_loc>
      <video:thumbnail_loc>https://it.etudes.ru/.data/etudes/polyhedra-development/thumb@fhd.jpg</video:thumbnail_loc>
      <video:title><![CDATA[E quest’altro sviluppo?!]]></video:title>
      <video:description><![CDATA[Gli sviluppi dei poliedri a noi più familiari non sono di un solo tipo.]]></video:description>
      <video:duration>377</video:duration>
    </video:video>
  </url>
  <url>
    <loc>https://it.etudes.ru/etudes/cycloid/</loc>
    <lastmod>2006-11-21</lastmod>
    <image:image>
      <image:loc>https://it.etudes.ru/.data/etudes/cycloid/01@fhd.jpg</image:loc>
      <image:title><![CDATA[La cicloide]]></image:title>
    </image:image>
    <image:image>
      <image:loc>https://it.etudes.ru/.data/etudes/cycloid/01@hd.jpg</image:loc>
      <image:title><![CDATA[La cicloide]]></image:title>
    </image:image>
    <image:image>
      <image:loc>https://it.etudes.ru/.data/etudes/cycloid/01.jpg</image:loc>
      <image:title><![CDATA[La cicloide]]></image:title>
    </image:image>
    <image:image>
      <image:loc>https://it.etudes.ru/.data/etudes/cycloid/02@fhd.jpg</image:loc>
      <image:title><![CDATA[La cicloide]]></image:title>
    </image:image>
    <image:image>
      <image:loc>https://it.etudes.ru/.data/etudes/cycloid/02@hd.jpg</image:loc>
      <image:title><![CDATA[La cicloide]]></image:title>
    </image:image>
    <image:image>
      <image:loc>https://it.etudes.ru/.data/etudes/cycloid/02.jpg</image:loc>
      <image:title><![CDATA[La cicloide]]></image:title>
    </image:image>
    <image:image>
      <image:loc>https://it.etudes.ru/.data/etudes/cycloid/03@fhd.jpg</image:loc>
      <image:title><![CDATA[La cicloide]]></image:title>
    </image:image>
    <image:image>
      <image:loc>https://it.etudes.ru/.data/etudes/cycloid/03@hd.jpg</image:loc>
      <image:title><![CDATA[La cicloide]]></image:title>
    </image:image>
    <image:image>
      <image:loc>https://it.etudes.ru/.data/etudes/cycloid/03.jpg</image:loc>
      <image:title><![CDATA[La cicloide]]></image:title>
    </image:image>
    <image:image>
      <image:loc>https://it.etudes.ru/.data/etudes/cycloid/04@fhd.jpg</image:loc>
      <image:title><![CDATA[La cicloide]]></image:title>
    </image:image>
    <image:image>
      <image:loc>https://it.etudes.ru/.data/etudes/cycloid/04@hd.jpg</image:loc>
      <image:title><![CDATA[La cicloide]]></image:title>
    </image:image>
    <image:image>
      <image:loc>https://it.etudes.ru/.data/etudes/cycloid/04.jpg</image:loc>
      <image:title><![CDATA[La cicloide]]></image:title>
    </image:image>
    <image:image>
      <image:loc>https://it.etudes.ru/.data/etudes/cycloid/05@fhd.jpg</image:loc>
      <image:title><![CDATA[La cicloide]]></image:title>
    </image:image>
    <image:image>
      <image:loc>https://it.etudes.ru/.data/etudes/cycloid/05@hd.jpg</image:loc>
      <image:title><![CDATA[La cicloide]]></image:title>
    </image:image>
    <image:image>
      <image:loc>https://it.etudes.ru/.data/etudes/cycloid/05.jpg</image:loc>
      <image:title><![CDATA[La cicloide]]></image:title>
    </image:image>
    <image:image>
      <image:loc>https://it.etudes.ru/.data/etudes/cycloid/06@fhd.jpg</image:loc>
      <image:title><![CDATA[La cicloide]]></image:title>
    </image:image>
    <image:image>
      <image:loc>https://it.etudes.ru/.data/etudes/cycloid/06@hd.jpg</image:loc>
      <image:title><![CDATA[La cicloide]]></image:title>
    </image:image>
    <image:image>
      <image:loc>https://it.etudes.ru/.data/etudes/cycloid/06.jpg</image:loc>
      <image:title><![CDATA[La cicloide]]></image:title>
    </image:image>
    <image:image>
      <image:loc>https://it.etudes.ru/.data/etudes/cycloid/07@fhd.jpg</image:loc>
      <image:title><![CDATA[La cicloide]]></image:title>
    </image:image>
    <image:image>
      <image:loc>https://it.etudes.ru/.data/etudes/cycloid/07@hd.jpg</image:loc>
      <image:title><![CDATA[La cicloide]]></image:title>
    </image:image>
    <image:image>
      <image:loc>https://it.etudes.ru/.data/etudes/cycloid/07.jpg</image:loc>
      <image:title><![CDATA[La cicloide]]></image:title>
    </image:image>
    <image:image>
      <image:loc>https://it.etudes.ru/.data/etudes/cycloid/08@fhd.jpg</image:loc>
      <image:title><![CDATA[La cicloide]]></image:title>
    </image:image>
    <image:image>
      <image:loc>https://it.etudes.ru/.data/etudes/cycloid/08@hd.jpg</image:loc>
      <image:title><![CDATA[La cicloide]]></image:title>
    </image:image>
    <image:image>
      <image:loc>https://it.etudes.ru/.data/etudes/cycloid/08.jpg</image:loc>
      <image:title><![CDATA[La cicloide]]></image:title>
    </image:image>
    <image:image>
      <image:loc>https://it.etudes.ru/.data/etudes/cycloid/09@fhd.jpg</image:loc>
      <image:title><![CDATA[La cicloide]]></image:title>
    </image:image>
    <image:image>
      <image:loc>https://it.etudes.ru/.data/etudes/cycloid/09@hd.jpg</image:loc>
      <image:title><![CDATA[La cicloide]]></image:title>
    </image:image>
    <image:image>
      <image:loc>https://it.etudes.ru/.data/etudes/cycloid/09.jpg</image:loc>
      <image:title><![CDATA[La cicloide]]></image:title>
    </image:image>
    <image:image>
      <image:loc>https://it.etudes.ru/.data/etudes/cycloid/10@fhd.jpg</image:loc>
      <image:title><![CDATA[La cicloide]]></image:title>
    </image:image>
    <image:image>
      <image:loc>https://it.etudes.ru/.data/etudes/cycloid/10@hd.jpg</image:loc>
      <image:title><![CDATA[La cicloide]]></image:title>
    </image:image>
    <image:image>
      <image:loc>https://it.etudes.ru/.data/etudes/cycloid/10.jpg</image:loc>
      <image:title><![CDATA[La cicloide]]></image:title>
    </image:image>
    <image:image>
      <image:loc>https://it.etudes.ru/.data/etudes/cycloid/11@fhd.jpg</image:loc>
      <image:title><![CDATA[La cicloide]]></image:title>
    </image:image>
    <image:image>
      <image:loc>https://it.etudes.ru/.data/etudes/cycloid/11@hd.jpg</image:loc>
      <image:title><![CDATA[La cicloide]]></image:title>
    </image:image>
    <image:image>
      <image:loc>https://it.etudes.ru/.data/etudes/cycloid/11.jpg</image:loc>
      <image:title><![CDATA[La cicloide]]></image:title>
    </image:image>
    <image:image>
      <image:loc>https://it.etudes.ru/.data/etudes/cycloid/12@fhd.jpg</image:loc>
      <image:title><![CDATA[La cicloide]]></image:title>
    </image:image>
    <image:image>
      <image:loc>https://it.etudes.ru/.data/etudes/cycloid/12@hd.jpg</image:loc>
      <image:title><![CDATA[La cicloide]]></image:title>
    </image:image>
    <image:image>
      <image:loc>https://it.etudes.ru/.data/etudes/cycloid/12.jpg</image:loc>
      <image:title><![CDATA[La cicloide]]></image:title>
    </image:image>
    <image:image>
      <image:loc>https://it.etudes.ru/.data/etudes/cycloid/13@fhd.jpg</image:loc>
      <image:title><![CDATA[La cicloide]]></image:title>
    </image:image>
    <image:image>
      <image:loc>https://it.etudes.ru/.data/etudes/cycloid/13@hd.jpg</image:loc>
      <image:title><![CDATA[La cicloide]]></image:title>
    </image:image>
    <image:image>
      <image:loc>https://it.etudes.ru/.data/etudes/cycloid/13.jpg</image:loc>
      <image:title><![CDATA[La cicloide]]></image:title>
    </image:image>
    <image:image>
      <image:loc>https://it.etudes.ru/.data/etudes/cycloid/14@fhd.jpg</image:loc>
      <image:title><![CDATA[La cicloide]]></image:title>
    </image:image>
    <image:image>
      <image:loc>https://it.etudes.ru/.data/etudes/cycloid/14@hd.jpg</image:loc>
      <image:title><![CDATA[La cicloide]]></image:title>
    </image:image>
    <image:image>
      <image:loc>https://it.etudes.ru/.data/etudes/cycloid/14.jpg</image:loc>
      <image:title><![CDATA[La cicloide]]></image:title>
    </image:image>
    <image:image>
      <image:loc>https://it.etudes.ru/.data/etudes/cycloid/15@fhd.jpg</image:loc>
      <image:title><![CDATA[La cicloide]]></image:title>
    </image:image>
    <image:image>
      <image:loc>https://it.etudes.ru/.data/etudes/cycloid/15@hd.jpg</image:loc>
      <image:title><![CDATA[La cicloide]]></image:title>
    </image:image>
    <image:image>
      <image:loc>https://it.etudes.ru/.data/etudes/cycloid/15.jpg</image:loc>
      <image:title><![CDATA[La cicloide]]></image:title>
    </image:image>
    <image:image>
      <image:loc>https://it.etudes.ru/.data/etudes/cycloid/16@fhd.jpg</image:loc>
      <image:title><![CDATA[La cicloide]]></image:title>
    </image:image>
    <image:image>
      <image:loc>https://it.etudes.ru/.data/etudes/cycloid/16@hd.jpg</image:loc>
      <image:title><![CDATA[La cicloide]]></image:title>
    </image:image>
    <image:image>
      <image:loc>https://it.etudes.ru/.data/etudes/cycloid/16.jpg</image:loc>
      <image:title><![CDATA[La cicloide]]></image:title>
    </image:image>
    <image:image>
      <image:loc>https://it.etudes.ru/.data/etudes/cycloid/17@fhd.jpg</image:loc>
      <image:title><![CDATA[La cicloide]]></image:title>
    </image:image>
    <image:image>
      <image:loc>https://it.etudes.ru/.data/etudes/cycloid/17@hd.jpg</image:loc>
      <image:title><![CDATA[La cicloide]]></image:title>
    </image:image>
    <image:image>
      <image:loc>https://it.etudes.ru/.data/etudes/cycloid/17.jpg</image:loc>
      <image:title><![CDATA[La cicloide]]></image:title>
    </image:image>
    <image:image>
      <image:loc>https://it.etudes.ru/.data/etudes/cycloid/18@fhd.jpg</image:loc>
      <image:title><![CDATA[La cicloide]]></image:title>
    </image:image>
    <image:image>
      <image:loc>https://it.etudes.ru/.data/etudes/cycloid/18@hd.jpg</image:loc>
      <image:title><![CDATA[La cicloide]]></image:title>
    </image:image>
    <image:image>
      <image:loc>https://it.etudes.ru/.data/etudes/cycloid/18.jpg</image:loc>
      <image:title><![CDATA[La cicloide]]></image:title>
    </image:image>
    <video:video>
      <video:content_loc>https://it.etudes.ru/.data/video/EtudesRu_cycloid@fhd.mp4</video:content_loc>
      <video:thumbnail_loc>https://it.etudes.ru/.data/etudes/cycloid/thumb@fhd.jpg</video:thumbnail_loc>
      <video:title><![CDATA[La cicloide]]></video:title>
      <video:description><![CDATA[Nel percorso di una moto è caduto un sassolino che si è attaccato al copertone della ruota posteriore. Dopo aver fatto alcuni giri con la ruota, dove volerà via il sassolino, quando si stacca dal copertone?]]></video:description>
      <video:duration>147</video:duration>
    </video:video>
  </url>
  <url>
    <loc>https://it.etudes.ru/etudes/ellipse/</loc>
    <lastmod>2006-11-16</lastmod>
    <image:image>
      <image:loc>https://it.etudes.ru/.data/etudes/ellipse/01@fhd.jpg</image:loc>
      <image:title><![CDATA[Ellisse]]></image:title>
    </image:image>
    <image:image>
      <image:loc>https://it.etudes.ru/.data/etudes/ellipse/01@hd.jpg</image:loc>
      <image:title><![CDATA[Ellisse]]></image:title>
    </image:image>
    <image:image>
      <image:loc>https://it.etudes.ru/.data/etudes/ellipse/01.jpg</image:loc>
      <image:title><![CDATA[Ellisse]]></image:title>
    </image:image>
    <image:image>
      <image:loc>https://it.etudes.ru/.data/etudes/ellipse/02@fhd.jpg</image:loc>
      <image:title><![CDATA[Ellisse]]></image:title>
    </image:image>
    <image:image>
      <image:loc>https://it.etudes.ru/.data/etudes/ellipse/02@hd.jpg</image:loc>
      <image:title><![CDATA[Ellisse]]></image:title>
    </image:image>
    <image:image>
      <image:loc>https://it.etudes.ru/.data/etudes/ellipse/02.jpg</image:loc>
      <image:title><![CDATA[Ellisse]]></image:title>
    </image:image>
    <image:image>
      <image:loc>https://it.etudes.ru/.data/etudes/ellipse/03@fhd.jpg</image:loc>
      <image:title><![CDATA[Ellisse]]></image:title>
    </image:image>
    <image:image>
      <image:loc>https://it.etudes.ru/.data/etudes/ellipse/03@hd.jpg</image:loc>
      <image:title><![CDATA[Ellisse]]></image:title>
    </image:image>
    <image:image>
      <image:loc>https://it.etudes.ru/.data/etudes/ellipse/03.jpg</image:loc>
      <image:title><![CDATA[Ellisse]]></image:title>
    </image:image>
    <video:video>
      <video:content_loc>https://it.etudes.ru/.data/video/EtudesRu_ellipse@fhd.mp4</video:content_loc>
      <video:thumbnail_loc>https://it.etudes.ru/.data/etudes/ellipse/thumb@fhd.jpg</video:thumbnail_loc>
      <video:title><![CDATA[Ellisse]]></video:title>
      <video:description><![CDATA[Disegnare un'ellisse usando una corda e due chiodi.]]></video:description>
      <video:duration>99</video:duration>
    </video:video>
  </url>
  <url>
    <loc>https://it.etudes.ru/etudes/polyhedra-net/</loc>
    <lastmod>2006-10-04</lastmod>
    <image:image>
      <image:loc>https://it.etudes.ru/.data/etudes/polyhedra-net/01@fhd.jpg</image:loc>
      <image:title><![CDATA[Lo sviluppo]]></image:title>
    </image:image>
    <image:image>
      <image:loc>https://it.etudes.ru/.data/etudes/polyhedra-net/01@hd.jpg</image:loc>
      <image:title><![CDATA[Lo sviluppo]]></image:title>
    </image:image>
    <image:image>
      <image:loc>https://it.etudes.ru/.data/etudes/polyhedra-net/01.jpg</image:loc>
      <image:title><![CDATA[Lo sviluppo]]></image:title>
    </image:image>
    <image:image>
      <image:loc>https://it.etudes.ru/.data/etudes/polyhedra-net/02@fhd.jpg</image:loc>
      <image:title><![CDATA[Lo sviluppo]]></image:title>
    </image:image>
    <image:image>
      <image:loc>https://it.etudes.ru/.data/etudes/polyhedra-net/02@hd.jpg</image:loc>
      <image:title><![CDATA[Lo sviluppo]]></image:title>
    </image:image>
    <image:image>
      <image:loc>https://it.etudes.ru/.data/etudes/polyhedra-net/02.jpg</image:loc>
      <image:title><![CDATA[Lo sviluppo]]></image:title>
    </image:image>
    <image:image>
      <image:loc>https://it.etudes.ru/.data/etudes/polyhedra-net/03@fhd.jpg</image:loc>
      <image:title><![CDATA[Lo sviluppo]]></image:title>
    </image:image>
    <image:image>
      <image:loc>https://it.etudes.ru/.data/etudes/polyhedra-net/03@hd.jpg</image:loc>
      <image:title><![CDATA[Lo sviluppo]]></image:title>
    </image:image>
    <image:image>
      <image:loc>https://it.etudes.ru/.data/etudes/polyhedra-net/03.jpg</image:loc>
      <image:title><![CDATA[Lo sviluppo]]></image:title>
    </image:image>
    <image:image>
      <image:loc>https://it.etudes.ru/.data/etudes/polyhedra-net/04@fhd.jpg</image:loc>
      <image:title><![CDATA[Lo sviluppo]]></image:title>
    </image:image>
    <image:image>
      <image:loc>https://it.etudes.ru/.data/etudes/polyhedra-net/04@hd.jpg</image:loc>
      <image:title><![CDATA[Lo sviluppo]]></image:title>
    </image:image>
    <image:image>
      <image:loc>https://it.etudes.ru/.data/etudes/polyhedra-net/04.jpg</image:loc>
      <image:title><![CDATA[Lo sviluppo]]></image:title>
    </image:image>
    <image:image>
      <image:loc>https://it.etudes.ru/.data/etudes/polyhedra-net/05@fhd.jpg</image:loc>
      <image:title><![CDATA[Lo sviluppo]]></image:title>
    </image:image>
    <image:image>
      <image:loc>https://it.etudes.ru/.data/etudes/polyhedra-net/05@hd.jpg</image:loc>
      <image:title><![CDATA[Lo sviluppo]]></image:title>
    </image:image>
    <image:image>
      <image:loc>https://it.etudes.ru/.data/etudes/polyhedra-net/05.jpg</image:loc>
      <image:title><![CDATA[Lo sviluppo]]></image:title>
    </image:image>
    <image:image>
      <image:loc>https://it.etudes.ru/.data/etudes/polyhedra-net/06@fhd.jpg</image:loc>
      <image:title><![CDATA[Lo sviluppo]]></image:title>
    </image:image>
    <image:image>
      <image:loc>https://it.etudes.ru/.data/etudes/polyhedra-net/06@hd.jpg</image:loc>
      <image:title><![CDATA[Lo sviluppo]]></image:title>
    </image:image>
    <image:image>
      <image:loc>https://it.etudes.ru/.data/etudes/polyhedra-net/06.jpg</image:loc>
      <image:title><![CDATA[Lo sviluppo]]></image:title>
    </image:image>
    <video:video>
      <video:content_loc>https://it.etudes.ru/.data/video/EtudesRu_polyhedra-net@fhd.mp4</video:content_loc>
      <video:thumbnail_loc>https://it.etudes.ru/.data/etudes/polyhedra-net/thumb@fhd.jpg</video:thumbnail_loc>
      <video:title><![CDATA[Lo sviluppo]]></video:title>
      <video:description><![CDATA[Che cos’è lo sviluppo di un poliedro vi chiederete? È semplicemente un pezzo di cartone ripiegando il quale si costruisce il poliedro dato. Questo è vero, ma c’è dell’altro. Il concetto di sviluppo di un poliedro racchiude in sé  qualcosa di più di un semplice pezzo di cartone.]]></video:description>
      <video:duration>377</video:duration>
    </video:video>
  </url>
  <url>
    <loc>https://it.etudes.ru/etudes/parabolic-antenna/</loc>
    <lastmod>2006-05-27</lastmod>
    <image:image>
      <image:loc>https://it.etudes.ru/.data/etudes/parabolic-antenna/01@fhd.jpg</image:loc>
      <image:title><![CDATA[L’antenna parabolica]]></image:title>
    </image:image>
    <image:image>
      <image:loc>https://it.etudes.ru/.data/etudes/parabolic-antenna/01@hd.jpg</image:loc>
      <image:title><![CDATA[L’antenna parabolica]]></image:title>
    </image:image>
    <image:image>
      <image:loc>https://it.etudes.ru/.data/etudes/parabolic-antenna/01.jpg</image:loc>
      <image:title><![CDATA[L’antenna parabolica]]></image:title>
    </image:image>
    <image:image>
      <image:loc>https://it.etudes.ru/.data/etudes/parabolic-antenna/02@fhd.jpg</image:loc>
      <image:title><![CDATA[L’antenna parabolica]]></image:title>
    </image:image>
    <image:image>
      <image:loc>https://it.etudes.ru/.data/etudes/parabolic-antenna/02@hd.jpg</image:loc>
      <image:title><![CDATA[L’antenna parabolica]]></image:title>
    </image:image>
    <image:image>
      <image:loc>https://it.etudes.ru/.data/etudes/parabolic-antenna/02.jpg</image:loc>
      <image:title><![CDATA[L’antenna parabolica]]></image:title>
    </image:image>
    <image:image>
      <image:loc>https://it.etudes.ru/.data/etudes/parabolic-antenna/03@fhd.jpg</image:loc>
      <image:title><![CDATA[L’antenna parabolica]]></image:title>
    </image:image>
    <image:image>
      <image:loc>https://it.etudes.ru/.data/etudes/parabolic-antenna/03@hd.jpg</image:loc>
      <image:title><![CDATA[L’antenna parabolica]]></image:title>
    </image:image>
    <image:image>
      <image:loc>https://it.etudes.ru/.data/etudes/parabolic-antenna/03.jpg</image:loc>
      <image:title><![CDATA[L’antenna parabolica]]></image:title>
    </image:image>
    <image:image>
      <image:loc>https://it.etudes.ru/.data/etudes/parabolic-antenna/04@fhd.jpg</image:loc>
      <image:title><![CDATA[L’antenna parabolica]]></image:title>
    </image:image>
    <image:image>
      <image:loc>https://it.etudes.ru/.data/etudes/parabolic-antenna/04@hd.jpg</image:loc>
      <image:title><![CDATA[L’antenna parabolica]]></image:title>
    </image:image>
    <image:image>
      <image:loc>https://it.etudes.ru/.data/etudes/parabolic-antenna/04.jpg</image:loc>
      <image:title><![CDATA[L’antenna parabolica]]></image:title>
    </image:image>
    <image:image>
      <image:loc>https://it.etudes.ru/.data/etudes/parabolic-antenna/05@fhd.jpg</image:loc>
      <image:title><![CDATA[L’antenna parabolica]]></image:title>
    </image:image>
    <image:image>
      <image:loc>https://it.etudes.ru/.data/etudes/parabolic-antenna/05@hd.jpg</image:loc>
      <image:title><![CDATA[L’antenna parabolica]]></image:title>
    </image:image>
    <image:image>
      <image:loc>https://it.etudes.ru/.data/etudes/parabolic-antenna/05.jpg</image:loc>
      <image:title><![CDATA[L’antenna parabolica]]></image:title>
    </image:image>
    <image:image>
      <image:loc>https://it.etudes.ru/.data/etudes/parabolic-antenna/06@fhd.jpg</image:loc>
      <image:title><![CDATA[L’antenna parabolica]]></image:title>
    </image:image>
    <image:image>
      <image:loc>https://it.etudes.ru/.data/etudes/parabolic-antenna/06@hd.jpg</image:loc>
      <image:title><![CDATA[L’antenna parabolica]]></image:title>
    </image:image>
    <image:image>
      <image:loc>https://it.etudes.ru/.data/etudes/parabolic-antenna/06.jpg</image:loc>
      <image:title><![CDATA[L’antenna parabolica]]></image:title>
    </image:image>
    <image:image>
      <image:loc>https://it.etudes.ru/.data/etudes/parabolic-antenna/07@fhd.jpg</image:loc>
      <image:title><![CDATA[L’antenna parabolica]]></image:title>
    </image:image>
    <image:image>
      <image:loc>https://it.etudes.ru/.data/etudes/parabolic-antenna/07@hd.jpg</image:loc>
      <image:title><![CDATA[L’antenna parabolica]]></image:title>
    </image:image>
    <image:image>
      <image:loc>https://it.etudes.ru/.data/etudes/parabolic-antenna/07.jpg</image:loc>
      <image:title><![CDATA[L’antenna parabolica]]></image:title>
    </image:image>
    <image:image>
      <image:loc>https://it.etudes.ru/.data/etudes/parabolic-antenna/08@fhd.jpg</image:loc>
      <image:title><![CDATA[L’antenna parabolica]]></image:title>
    </image:image>
    <image:image>
      <image:loc>https://it.etudes.ru/.data/etudes/parabolic-antenna/08@hd.jpg</image:loc>
      <image:title><![CDATA[L’antenna parabolica]]></image:title>
    </image:image>
    <image:image>
      <image:loc>https://it.etudes.ru/.data/etudes/parabolic-antenna/08.jpg</image:loc>
      <image:title><![CDATA[L’antenna parabolica]]></image:title>
    </image:image>
    <video:video>
      <video:content_loc>https://it.etudes.ru/.data/video/EtudesRu_parabolic-antenna@fhd.mp4</video:content_loc>
      <video:thumbnail_loc>https://it.etudes.ru/.data/etudes/parabolic-antenna/thumb@fhd.jpg</video:thumbnail_loc>
      <video:title><![CDATA[L’antenna parabolica]]></video:title>
      <video:description><![CDATA[Perché la maggior parte delle antenne satellitari hanno la stessa forma?  La risposta  a questa domanda, se pure in forma implicita, l´avete imparata  a scuola.]]></video:description>
      <video:duration>159</video:duration>
    </video:video>
  </url>
  <url>
    <loc>https://it.etudes.ru/etudes/cubic-parquet/</loc>
    <lastmod>2006-03-21</lastmod>
    <video:video>
      <video:content_loc>https://it.etudes.ru/.data/video/EtudesRu_cubic-parquet@fhd.mp4</video:content_loc>
      <video:thumbnail_loc>https://it.etudes.ru/.data/etudes/cubic-parquet/thumb@fhd.jpg</video:thumbnail_loc>
      <video:title><![CDATA[Un parquet cubistico]]></video:title>
      <video:description><![CDATA[Quanti sviluppi del cubo esistono? È interessante notare che ognuno di essi può essere usato come un tassello di parquet per la vostra camera.]]></video:description>
      <video:duration>377</video:duration>
    </video:video>
  </url>
  <url>
    <loc>https://it.etudes.ru/etudes/polyhedra-embedding/</loc>
    <lastmod>2006-01-24</lastmod>
    <image:image>
      <image:loc>https://it.etudes.ru/.data/etudes/polyhedra-embedding/01@fhd.jpg</image:loc>
      <image:title><![CDATA[Solidi a facce ricurve con lo stesso sviluppo di poliedri]]></image:title>
    </image:image>
    <image:image>
      <image:loc>https://it.etudes.ru/.data/etudes/polyhedra-embedding/01@hd.jpg</image:loc>
      <image:title><![CDATA[Solidi a facce ricurve con lo stesso sviluppo di poliedri]]></image:title>
    </image:image>
    <image:image>
      <image:loc>https://it.etudes.ru/.data/etudes/polyhedra-embedding/01.jpg</image:loc>
      <image:title><![CDATA[Solidi a facce ricurve con lo stesso sviluppo di poliedri]]></image:title>
    </image:image>
    <image:image>
      <image:loc>https://it.etudes.ru/.data/etudes/polyhedra-embedding/02@fhd.jpg</image:loc>
      <image:title><![CDATA[Solidi a facce ricurve con lo stesso sviluppo di poliedri]]></image:title>
    </image:image>
    <image:image>
      <image:loc>https://it.etudes.ru/.data/etudes/polyhedra-embedding/02@hd.jpg</image:loc>
      <image:title><![CDATA[Solidi a facce ricurve con lo stesso sviluppo di poliedri]]></image:title>
    </image:image>
    <image:image>
      <image:loc>https://it.etudes.ru/.data/etudes/polyhedra-embedding/02.jpg</image:loc>
      <image:title><![CDATA[Solidi a facce ricurve con lo stesso sviluppo di poliedri]]></image:title>
    </image:image>
    <image:image>
      <image:loc>https://it.etudes.ru/.data/etudes/polyhedra-embedding/03@fhd.jpg</image:loc>
      <image:title><![CDATA[Solidi a facce ricurve con lo stesso sviluppo di poliedri]]></image:title>
    </image:image>
    <image:image>
      <image:loc>https://it.etudes.ru/.data/etudes/polyhedra-embedding/03@hd.jpg</image:loc>
      <image:title><![CDATA[Solidi a facce ricurve con lo stesso sviluppo di poliedri]]></image:title>
    </image:image>
    <image:image>
      <image:loc>https://it.etudes.ru/.data/etudes/polyhedra-embedding/03.jpg</image:loc>
      <image:title><![CDATA[Solidi a facce ricurve con lo stesso sviluppo di poliedri]]></image:title>
    </image:image>
    <image:image>
      <image:loc>https://it.etudes.ru/.data/etudes/polyhedra-embedding/04@fhd.jpg</image:loc>
      <image:title><![CDATA[Solidi a facce ricurve con lo stesso sviluppo di poliedri]]></image:title>
    </image:image>
    <image:image>
      <image:loc>https://it.etudes.ru/.data/etudes/polyhedra-embedding/04@hd.jpg</image:loc>
      <image:title><![CDATA[Solidi a facce ricurve con lo stesso sviluppo di poliedri]]></image:title>
    </image:image>
    <image:image>
      <image:loc>https://it.etudes.ru/.data/etudes/polyhedra-embedding/04.jpg</image:loc>
      <image:title><![CDATA[Solidi a facce ricurve con lo stesso sviluppo di poliedri]]></image:title>
    </image:image>
    <image:image>
      <image:loc>https://it.etudes.ru/.data/etudes/polyhedra-embedding/05@fhd.jpg</image:loc>
      <image:title><![CDATA[Solidi a facce ricurve con lo stesso sviluppo di poliedri]]></image:title>
    </image:image>
    <image:image>
      <image:loc>https://it.etudes.ru/.data/etudes/polyhedra-embedding/05@hd.jpg</image:loc>
      <image:title><![CDATA[Solidi a facce ricurve con lo stesso sviluppo di poliedri]]></image:title>
    </image:image>
    <image:image>
      <image:loc>https://it.etudes.ru/.data/etudes/polyhedra-embedding/05.jpg</image:loc>
      <image:title><![CDATA[Solidi a facce ricurve con lo stesso sviluppo di poliedri]]></image:title>
    </image:image>
    <image:image>
      <image:loc>https://it.etudes.ru/.data/etudes/polyhedra-embedding/06@fhd.jpg</image:loc>
      <image:title><![CDATA[Solidi a facce ricurve con lo stesso sviluppo di poliedri]]></image:title>
    </image:image>
    <image:image>
      <image:loc>https://it.etudes.ru/.data/etudes/polyhedra-embedding/06@hd.jpg</image:loc>
      <image:title><![CDATA[Solidi a facce ricurve con lo stesso sviluppo di poliedri]]></image:title>
    </image:image>
    <image:image>
      <image:loc>https://it.etudes.ru/.data/etudes/polyhedra-embedding/06.jpg</image:loc>
      <image:title><![CDATA[Solidi a facce ricurve con lo stesso sviluppo di poliedri]]></image:title>
    </image:image>
    <image:image>
      <image:loc>https://it.etudes.ru/.data/etudes/polyhedra-embedding/07@fhd.jpg</image:loc>
      <image:title><![CDATA[Solidi a facce ricurve con lo stesso sviluppo di poliedri]]></image:title>
    </image:image>
    <image:image>
      <image:loc>https://it.etudes.ru/.data/etudes/polyhedra-embedding/07@hd.jpg</image:loc>
      <image:title><![CDATA[Solidi a facce ricurve con lo stesso sviluppo di poliedri]]></image:title>
    </image:image>
    <image:image>
      <image:loc>https://it.etudes.ru/.data/etudes/polyhedra-embedding/07.jpg</image:loc>
      <image:title><![CDATA[Solidi a facce ricurve con lo stesso sviluppo di poliedri]]></image:title>
    </image:image>
    <image:image>
      <image:loc>https://it.etudes.ru/.data/etudes/polyhedra-embedding/08@fhd.jpg</image:loc>
      <image:title><![CDATA[Solidi a facce ricurve con lo stesso sviluppo di poliedri]]></image:title>
    </image:image>
    <image:image>
      <image:loc>https://it.etudes.ru/.data/etudes/polyhedra-embedding/08@hd.jpg</image:loc>
      <image:title><![CDATA[Solidi a facce ricurve con lo stesso sviluppo di poliedri]]></image:title>
    </image:image>
    <image:image>
      <image:loc>https://it.etudes.ru/.data/etudes/polyhedra-embedding/08.jpg</image:loc>
      <image:title><![CDATA[Solidi a facce ricurve con lo stesso sviluppo di poliedri]]></image:title>
    </image:image>
    <image:image>
      <image:loc>https://it.etudes.ru/.data/etudes/polyhedra-embedding/09@fhd.jpg</image:loc>
      <image:title><![CDATA[Solidi a facce ricurve con lo stesso sviluppo di poliedri]]></image:title>
    </image:image>
    <image:image>
      <image:loc>https://it.etudes.ru/.data/etudes/polyhedra-embedding/09@hd.jpg</image:loc>
      <image:title><![CDATA[Solidi a facce ricurve con lo stesso sviluppo di poliedri]]></image:title>
    </image:image>
    <image:image>
      <image:loc>https://it.etudes.ru/.data/etudes/polyhedra-embedding/09.jpg</image:loc>
      <image:title><![CDATA[Solidi a facce ricurve con lo stesso sviluppo di poliedri]]></image:title>
    </image:image>
    <image:image>
      <image:loc>https://it.etudes.ru/.data/etudes/polyhedra-embedding/10@fhd.jpg</image:loc>
      <image:title><![CDATA[Solidi a facce ricurve con lo stesso sviluppo di poliedri]]></image:title>
    </image:image>
    <image:image>
      <image:loc>https://it.etudes.ru/.data/etudes/polyhedra-embedding/10@hd.jpg</image:loc>
      <image:title><![CDATA[Solidi a facce ricurve con lo stesso sviluppo di poliedri]]></image:title>
    </image:image>
    <image:image>
      <image:loc>https://it.etudes.ru/.data/etudes/polyhedra-embedding/10.jpg</image:loc>
      <image:title><![CDATA[Solidi a facce ricurve con lo stesso sviluppo di poliedri]]></image:title>
    </image:image>
    <image:image>
      <image:loc>https://it.etudes.ru/.data/etudes/polyhedra-embedding/11@fhd.jpg</image:loc>
      <image:title><![CDATA[Solidi a facce ricurve con lo stesso sviluppo di poliedri]]></image:title>
    </image:image>
    <image:image>
      <image:loc>https://it.etudes.ru/.data/etudes/polyhedra-embedding/11@hd.jpg</image:loc>
      <image:title><![CDATA[Solidi a facce ricurve con lo stesso sviluppo di poliedri]]></image:title>
    </image:image>
    <image:image>
      <image:loc>https://it.etudes.ru/.data/etudes/polyhedra-embedding/11.jpg</image:loc>
      <image:title><![CDATA[Solidi a facce ricurve con lo stesso sviluppo di poliedri]]></image:title>
    </image:image>
    <video:video>
      <video:content_loc>https://it.etudes.ru/.data/video/EtudesRu_polyhedra-embedding@fhd.mp4</video:content_loc>
      <video:thumbnail_loc>https://it.etudes.ru/.data/etudes/polyhedra-embedding/thumb@fhd.jpg</video:thumbnail_loc>
      <video:title><![CDATA[Solidi a facce ricurve con lo stesso sviluppo di poliedri]]></video:title>
      <video:description><![CDATA[Si può ripiegare lo sviluppo di un poliedro in modo da ottenere un solido, le cui facce non sono piane ma superfici ricurve?]]></video:description>
      <video:duration>377</video:duration>
    </video:video>
  </url>
  <url>
    <loc>https://it.etudes.ru/etudes/figures-area/</loc>
    <lastmod>2006-01-09</lastmod>
    <image:image>
      <image:loc>https://it.etudes.ru/.data/etudes/figures-area/01@fhd.jpg</image:loc>
      <image:title><![CDATA[L’area delle figure piane]]></image:title>
    </image:image>
    <image:image>
      <image:loc>https://it.etudes.ru/.data/etudes/figures-area/01@hd.jpg</image:loc>
      <image:title><![CDATA[L’area delle figure piane]]></image:title>
    </image:image>
    <image:image>
      <image:loc>https://it.etudes.ru/.data/etudes/figures-area/01.jpg</image:loc>
      <image:title><![CDATA[L’area delle figure piane]]></image:title>
    </image:image>
    <image:image>
      <image:loc>https://it.etudes.ru/.data/etudes/figures-area/02@fhd.jpg</image:loc>
      <image:title><![CDATA[L’area delle figure piane]]></image:title>
    </image:image>
    <image:image>
      <image:loc>https://it.etudes.ru/.data/etudes/figures-area/02@hd.jpg</image:loc>
      <image:title><![CDATA[L’area delle figure piane]]></image:title>
    </image:image>
    <image:image>
      <image:loc>https://it.etudes.ru/.data/etudes/figures-area/02.jpg</image:loc>
      <image:title><![CDATA[L’area delle figure piane]]></image:title>
    </image:image>
    <image:image>
      <image:loc>https://it.etudes.ru/.data/etudes/figures-area/03@fhd.jpg</image:loc>
      <image:title><![CDATA[L’area delle figure piane]]></image:title>
    </image:image>
    <image:image>
      <image:loc>https://it.etudes.ru/.data/etudes/figures-area/03@hd.jpg</image:loc>
      <image:title><![CDATA[L’area delle figure piane]]></image:title>
    </image:image>
    <image:image>
      <image:loc>https://it.etudes.ru/.data/etudes/figures-area/03.jpg</image:loc>
      <image:title><![CDATA[L’area delle figure piane]]></image:title>
    </image:image>
    <image:image>
      <image:loc>https://it.etudes.ru/.data/etudes/figures-area/04@fhd.jpg</image:loc>
      <image:title><![CDATA[L’area delle figure piane]]></image:title>
    </image:image>
    <image:image>
      <image:loc>https://it.etudes.ru/.data/etudes/figures-area/04@hd.jpg</image:loc>
      <image:title><![CDATA[L’area delle figure piane]]></image:title>
    </image:image>
    <image:image>
      <image:loc>https://it.etudes.ru/.data/etudes/figures-area/04.jpg</image:loc>
      <image:title><![CDATA[L’area delle figure piane]]></image:title>
    </image:image>
    <image:image>
      <image:loc>https://it.etudes.ru/.data/etudes/figures-area/05@fhd.jpg</image:loc>
      <image:title><![CDATA[L’area delle figure piane]]></image:title>
    </image:image>
    <image:image>
      <image:loc>https://it.etudes.ru/.data/etudes/figures-area/05@hd.jpg</image:loc>
      <image:title><![CDATA[L’area delle figure piane]]></image:title>
    </image:image>
    <image:image>
      <image:loc>https://it.etudes.ru/.data/etudes/figures-area/05.jpg</image:loc>
      <image:title><![CDATA[L’area delle figure piane]]></image:title>
    </image:image>
    <image:image>
      <image:loc>https://it.etudes.ru/.data/etudes/figures-area/06@fhd.jpg</image:loc>
      <image:title><![CDATA[L’area delle figure piane]]></image:title>
    </image:image>
    <image:image>
      <image:loc>https://it.etudes.ru/.data/etudes/figures-area/06@hd.jpg</image:loc>
      <image:title><![CDATA[L’area delle figure piane]]></image:title>
    </image:image>
    <image:image>
      <image:loc>https://it.etudes.ru/.data/etudes/figures-area/06.jpg</image:loc>
      <image:title><![CDATA[L’area delle figure piane]]></image:title>
    </image:image>
    <image:image>
      <image:loc>https://it.etudes.ru/.data/etudes/figures-area/07@fhd.jpg</image:loc>
      <image:title><![CDATA[L’area delle figure piane]]></image:title>
    </image:image>
    <image:image>
      <image:loc>https://it.etudes.ru/.data/etudes/figures-area/07@hd.jpg</image:loc>
      <image:title><![CDATA[L’area delle figure piane]]></image:title>
    </image:image>
    <image:image>
      <image:loc>https://it.etudes.ru/.data/etudes/figures-area/07.jpg</image:loc>
      <image:title><![CDATA[L’area delle figure piane]]></image:title>
    </image:image>
    <image:image>
      <image:loc>https://it.etudes.ru/.data/etudes/figures-area/08@fhd.jpg</image:loc>
      <image:title><![CDATA[L’area delle figure piane]]></image:title>
    </image:image>
    <image:image>
      <image:loc>https://it.etudes.ru/.data/etudes/figures-area/08@hd.jpg</image:loc>
      <image:title><![CDATA[L’area delle figure piane]]></image:title>
    </image:image>
    <image:image>
      <image:loc>https://it.etudes.ru/.data/etudes/figures-area/08.jpg</image:loc>
      <image:title><![CDATA[L’area delle figure piane]]></image:title>
    </image:image>
    <image:image>
      <image:loc>https://it.etudes.ru/.data/etudes/figures-area/09@fhd.jpg</image:loc>
      <image:title><![CDATA[L’area delle figure piane]]></image:title>
    </image:image>
    <image:image>
      <image:loc>https://it.etudes.ru/.data/etudes/figures-area/09@hd.jpg</image:loc>
      <image:title><![CDATA[L’area delle figure piane]]></image:title>
    </image:image>
    <image:image>
      <image:loc>https://it.etudes.ru/.data/etudes/figures-area/09.jpg</image:loc>
      <image:title><![CDATA[L’area delle figure piane]]></image:title>
    </image:image>
    <image:image>
      <image:loc>https://it.etudes.ru/.data/etudes/figures-area/10@fhd.jpg</image:loc>
      <image:title><![CDATA[L’area delle figure piane]]></image:title>
    </image:image>
    <image:image>
      <image:loc>https://it.etudes.ru/.data/etudes/figures-area/10@hd.jpg</image:loc>
      <image:title><![CDATA[L’area delle figure piane]]></image:title>
    </image:image>
    <image:image>
      <image:loc>https://it.etudes.ru/.data/etudes/figures-area/10.jpg</image:loc>
      <image:title><![CDATA[L’area delle figure piane]]></image:title>
    </image:image>
    <image:image>
      <image:loc>https://it.etudes.ru/.data/etudes/figures-area/11@fhd.jpg</image:loc>
      <image:title><![CDATA[L’area delle figure piane]]></image:title>
    </image:image>
    <image:image>
      <image:loc>https://it.etudes.ru/.data/etudes/figures-area/11@hd.jpg</image:loc>
      <image:title><![CDATA[L’area delle figure piane]]></image:title>
    </image:image>
    <image:image>
      <image:loc>https://it.etudes.ru/.data/etudes/figures-area/11.jpg</image:loc>
      <image:title><![CDATA[L’area delle figure piane]]></image:title>
    </image:image>
    <image:image>
      <image:loc>https://it.etudes.ru/.data/etudes/figures-area/12@fhd.jpg</image:loc>
      <image:title><![CDATA[L’area delle figure piane]]></image:title>
    </image:image>
    <image:image>
      <image:loc>https://it.etudes.ru/.data/etudes/figures-area/12@hd.jpg</image:loc>
      <image:title><![CDATA[L’area delle figure piane]]></image:title>
    </image:image>
    <image:image>
      <image:loc>https://it.etudes.ru/.data/etudes/figures-area/12.jpg</image:loc>
      <image:title><![CDATA[L’area delle figure piane]]></image:title>
    </image:image>
    <video:video>
      <video:content_loc>https://it.etudes.ru/.data/video/EtudesRu_figures-area@fhd.mp4</video:content_loc>
      <video:thumbnail_loc>https://it.etudes.ru/.data/etudes/figures-area/thumb@fhd.jpg</video:thumbnail_loc>
      <video:title><![CDATA[L’area delle figure piane]]></video:title>
      <video:description><![CDATA[L’area del quadrato è uguale al quadrato della lunghezza del suo lato. È facile calcolare l’area di una figura che si può suddividere in diversi quadrati. Ma qual è l’area di una figura limitata da una curva qualunque?]]></video:description>
      <video:duration>377</video:duration>
    </video:video>
  </url>
  <url>
    <loc>https://it.etudes.ru/etudes/fold-cut-problem/</loc>
    <lastmod>2005-11-16</lastmod>
    <image:image>
      <image:loc>https://it.etudes.ru/.data/etudes/fold-cut-problem/01@fhd.jpg</image:loc>
      <image:title><![CDATA[Con un solo taglio]]></image:title>
    </image:image>
    <image:image>
      <image:loc>https://it.etudes.ru/.data/etudes/fold-cut-problem/01@hd.jpg</image:loc>
      <image:title><![CDATA[Con un solo taglio]]></image:title>
    </image:image>
    <image:image>
      <image:loc>https://it.etudes.ru/.data/etudes/fold-cut-problem/01.jpg</image:loc>
      <image:title><![CDATA[Con un solo taglio]]></image:title>
    </image:image>
    <image:image>
      <image:loc>https://it.etudes.ru/.data/etudes/fold-cut-problem/02@fhd.jpg</image:loc>
      <image:title><![CDATA[Con un solo taglio]]></image:title>
    </image:image>
    <image:image>
      <image:loc>https://it.etudes.ru/.data/etudes/fold-cut-problem/02@hd.jpg</image:loc>
      <image:title><![CDATA[Con un solo taglio]]></image:title>
    </image:image>
    <image:image>
      <image:loc>https://it.etudes.ru/.data/etudes/fold-cut-problem/02.jpg</image:loc>
      <image:title><![CDATA[Con un solo taglio]]></image:title>
    </image:image>
    <image:image>
      <image:loc>https://it.etudes.ru/.data/etudes/fold-cut-problem/03@fhd.jpg</image:loc>
      <image:title><![CDATA[Con un solo taglio]]></image:title>
    </image:image>
    <image:image>
      <image:loc>https://it.etudes.ru/.data/etudes/fold-cut-problem/03@hd.jpg</image:loc>
      <image:title><![CDATA[Con un solo taglio]]></image:title>
    </image:image>
    <image:image>
      <image:loc>https://it.etudes.ru/.data/etudes/fold-cut-problem/03.jpg</image:loc>
      <image:title><![CDATA[Con un solo taglio]]></image:title>
    </image:image>
    <image:image>
      <image:loc>https://it.etudes.ru/.data/etudes/fold-cut-problem/04@fhd.jpg</image:loc>
      <image:title><![CDATA[Con un solo taglio]]></image:title>
    </image:image>
    <image:image>
      <image:loc>https://it.etudes.ru/.data/etudes/fold-cut-problem/04@hd.jpg</image:loc>
      <image:title><![CDATA[Con un solo taglio]]></image:title>
    </image:image>
    <image:image>
      <image:loc>https://it.etudes.ru/.data/etudes/fold-cut-problem/04.jpg</image:loc>
      <image:title><![CDATA[Con un solo taglio]]></image:title>
    </image:image>
    <image:image>
      <image:loc>https://it.etudes.ru/.data/etudes/fold-cut-problem/05@fhd.jpg</image:loc>
      <image:title><![CDATA[Con un solo taglio]]></image:title>
    </image:image>
    <image:image>
      <image:loc>https://it.etudes.ru/.data/etudes/fold-cut-problem/05@hd.jpg</image:loc>
      <image:title><![CDATA[Con un solo taglio]]></image:title>
    </image:image>
    <image:image>
      <image:loc>https://it.etudes.ru/.data/etudes/fold-cut-problem/05.jpg</image:loc>
      <image:title><![CDATA[Con un solo taglio]]></image:title>
    </image:image>
    <image:image>
      <image:loc>https://it.etudes.ru/.data/etudes/fold-cut-problem/06@fhd.jpg</image:loc>
      <image:title><![CDATA[Con un solo taglio]]></image:title>
    </image:image>
    <image:image>
      <image:loc>https://it.etudes.ru/.data/etudes/fold-cut-problem/06@hd.jpg</image:loc>
      <image:title><![CDATA[Con un solo taglio]]></image:title>
    </image:image>
    <image:image>
      <image:loc>https://it.etudes.ru/.data/etudes/fold-cut-problem/06.jpg</image:loc>
      <image:title><![CDATA[Con un solo taglio]]></image:title>
    </image:image>
    <image:image>
      <image:loc>https://it.etudes.ru/.data/etudes/fold-cut-problem/07@fhd.jpg</image:loc>
      <image:title><![CDATA[Con un solo taglio]]></image:title>
    </image:image>
    <image:image>
      <image:loc>https://it.etudes.ru/.data/etudes/fold-cut-problem/07@hd.jpg</image:loc>
      <image:title><![CDATA[Con un solo taglio]]></image:title>
    </image:image>
    <image:image>
      <image:loc>https://it.etudes.ru/.data/etudes/fold-cut-problem/07.jpg</image:loc>
      <image:title><![CDATA[Con un solo taglio]]></image:title>
    </image:image>
    <image:image>
      <image:loc>https://it.etudes.ru/.data/etudes/fold-cut-problem/08@fhd.jpg</image:loc>
      <image:title><![CDATA[Con un solo taglio]]></image:title>
    </image:image>
    <image:image>
      <image:loc>https://it.etudes.ru/.data/etudes/fold-cut-problem/08@hd.jpg</image:loc>
      <image:title><![CDATA[Con un solo taglio]]></image:title>
    </image:image>
    <image:image>
      <image:loc>https://it.etudes.ru/.data/etudes/fold-cut-problem/08.jpg</image:loc>
      <image:title><![CDATA[Con un solo taglio]]></image:title>
    </image:image>
    <video:video>
      <video:content_loc>https://it.etudes.ru/.data/video/EtudesRu_fold-cut-problem@fhd.mp4</video:content_loc>
      <video:thumbnail_loc>https://it.etudes.ru/.data/etudes/fold-cut-problem/thumb@fhd.jpg</video:thumbnail_loc>
      <video:title><![CDATA[Con un solo taglio]]></video:title>
      <video:description><![CDATA[Su un foglio di carta è disegnato un poligono arbitrario. È possibile piegare il foglio di carta in modo che sia possibile ritagliare il poligono facendo un solo taglio rettilineo?]]></video:description>
      <video:duration>377</video:duration>
    </video:video>
  </url>
  <url>
    <loc>https://it.etudes.ru/etudes/reuleaux-triangle/</loc>
    <lastmod>2005-03-29</lastmod>
    <image:image>
      <image:loc>https://it.etudes.ru/.data/etudes/reuleaux-triangle/01@fhd.jpg</image:loc>
      <image:title><![CDATA[Il triangolo curvo di Reuleaux]]></image:title>
    </image:image>
    <image:image>
      <image:loc>https://it.etudes.ru/.data/etudes/reuleaux-triangle/01@hd.jpg</image:loc>
      <image:title><![CDATA[Il triangolo curvo di Reuleaux]]></image:title>
    </image:image>
    <image:image>
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      <image:title><![CDATA[Il triangolo curvo di Reuleaux]]></image:title>
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      <image:loc>https://it.etudes.ru/.data/etudes/reuleaux-triangle/20@fhd.jpg</image:loc>
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      <image:loc>https://it.etudes.ru/.data/etudes/reuleaux-triangle/20@hd.jpg</image:loc>
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      <image:title><![CDATA[Il triangolo curvo di Reuleaux]]></image:title>
    </image:image>
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      <video:title><![CDATA[Il triangolo curvo di Reuleaux]]></video:title>
      <video:description><![CDATA[Consideriamo un triangolo equilatero (con i lati uguali). Su ogni lato  costruiamo un arco di cerchio di raggio uguale alla lunghezza del lato. La curva così ottenuta porta il nome di ”triangolo di Reuleaux”]]></video:description>
      <video:duration>377</video:duration>
    </video:video>
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      <image:title><![CDATA[Aumentare il volume di poliedri convessi]]></image:title>
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      <video:title><![CDATA[Aumentare il volume di poliedri convessi]]></video:title>
      <video:description><![CDATA[Ricordate che forma aveva un pacchetto di latte cinquanta anni fa? È sorprendente che tutta l’Italia comprasse dei pacchetti simili quasi ogni giorno, per più di venti anni, ma pochi ora ricordano precisamente cosa ci fosse scritto sopra. Lo steso avviene per tutta la Russia!]]></video:description>
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    <image:image>
      <image:loc>https://it.etudes.ru/.data/etudes/polyhedra-volume-increasing/01@fhd.jpg</image:loc>
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      <image:loc>https://it.etudes.ru/.data/etudes/polyhedra-volume-increasing/03@hd.jpg</image:loc>
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      <image:loc>https://it.etudes.ru/.data/etudes/polyhedra-volume-increasing/03.jpg</image:loc>
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      <image:loc>https://it.etudes.ru/.data/etudes/polyhedra-volume-increasing/04@fhd.jpg</image:loc>
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      <image:loc>https://it.etudes.ru/.data/etudes/polyhedra-volume-increasing/04.jpg</image:loc>
      <image:title><![CDATA[Aumentare il volume di poliedri convessi]]></image:title>
    </image:image>
    <image:image>
      <image:loc>https://it.etudes.ru/.data/etudes/polyhedra-volume-increasing/05@fhd.jpg</image:loc>
      <image:title><![CDATA[Aumentare il volume di poliedri convessi]]></image:title>
    </image:image>
    <image:image>
      <image:loc>https://it.etudes.ru/.data/etudes/polyhedra-volume-increasing/05@hd.jpg</image:loc>
      <image:title><![CDATA[Aumentare il volume di poliedri convessi]]></image:title>
    </image:image>
    <image:image>
      <image:loc>https://it.etudes.ru/.data/etudes/polyhedra-volume-increasing/05.jpg</image:loc>
      <image:title><![CDATA[Aumentare il volume di poliedri convessi]]></image:title>
    </image:image>
    <image:image>
      <image:loc>https://it.etudes.ru/.data/etudes/polyhedra-volume-increasing/06@fhd.jpg</image:loc>
      <image:title><![CDATA[Aumentare il volume di poliedri convessi]]></image:title>
    </image:image>
    <image:image>
      <image:loc>https://it.etudes.ru/.data/etudes/polyhedra-volume-increasing/06@hd.jpg</image:loc>
      <image:title><![CDATA[Aumentare il volume di poliedri convessi]]></image:title>
    </image:image>
    <image:image>
      <image:loc>https://it.etudes.ru/.data/etudes/polyhedra-volume-increasing/06.jpg</image:loc>
      <image:title><![CDATA[Aumentare il volume di poliedri convessi]]></image:title>
    </image:image>
    <image:image>
      <image:loc>https://it.etudes.ru/.data/etudes/polyhedra-volume-increasing/07@fhd.jpg</image:loc>
      <image:title><![CDATA[Aumentare il volume di poliedri convessi]]></image:title>
    </image:image>
    <image:image>
      <image:loc>https://it.etudes.ru/.data/etudes/polyhedra-volume-increasing/07@hd.jpg</image:loc>
      <image:title><![CDATA[Aumentare il volume di poliedri convessi]]></image:title>
    </image:image>
    <image:image>
      <image:loc>https://it.etudes.ru/.data/etudes/polyhedra-volume-increasing/07.jpg</image:loc>
      <image:title><![CDATA[Aumentare il volume di poliedri convessi]]></image:title>
    </image:image>
    <image:image>
      <image:loc>https://it.etudes.ru/.data/etudes/polyhedra-volume-increasing/08@fhd.jpg</image:loc>
      <image:title><![CDATA[Aumentare il volume di poliedri convessi]]></image:title>
    </image:image>
    <image:image>
      <image:loc>https://it.etudes.ru/.data/etudes/polyhedra-volume-increasing/08@hd.jpg</image:loc>
      <image:title><![CDATA[Aumentare il volume di poliedri convessi]]></image:title>
    </image:image>
    <image:image>
      <image:loc>https://it.etudes.ru/.data/etudes/polyhedra-volume-increasing/08.jpg</image:loc>
      <image:title><![CDATA[Aumentare il volume di poliedri convessi]]></image:title>
    </image:image>
    <image:image>
      <image:loc>https://it.etudes.ru/.data/etudes/polyhedra-volume-increasing/09@fhd.jpg</image:loc>
      <image:title><![CDATA[Aumentare il volume di poliedri convessi]]></image:title>
    </image:image>
    <image:image>
      <image:loc>https://it.etudes.ru/.data/etudes/polyhedra-volume-increasing/09@hd.jpg</image:loc>
      <image:title><![CDATA[Aumentare il volume di poliedri convessi]]></image:title>
    </image:image>
    <image:image>
      <image:loc>https://it.etudes.ru/.data/etudes/polyhedra-volume-increasing/09.jpg</image:loc>
      <image:title><![CDATA[Aumentare il volume di poliedri convessi]]></image:title>
    </image:image>
    <image:image>
      <image:loc>https://it.etudes.ru/.data/etudes/polyhedra-volume-increasing/10@fhd.jpg</image:loc>
      <image:title><![CDATA[Aumentare il volume di poliedri convessi]]></image:title>
    </image:image>
    <image:image>
      <image:loc>https://it.etudes.ru/.data/etudes/polyhedra-volume-increasing/10@hd.jpg</image:loc>
      <image:title><![CDATA[Aumentare il volume di poliedri convessi]]></image:title>
    </image:image>
    <image:image>
      <image:loc>https://it.etudes.ru/.data/etudes/polyhedra-volume-increasing/10.jpg</image:loc>
      <image:title><![CDATA[Aumentare il volume di poliedri convessi]]></image:title>
    </image:image>
    <image:image>
      <image:loc>https://it.etudes.ru/.data/etudes/polyhedra-volume-increasing/11@fhd.jpg</image:loc>
      <image:title><![CDATA[Aumentare il volume di poliedri convessi]]></image:title>
    </image:image>
    <image:image>
      <image:loc>https://it.etudes.ru/.data/etudes/polyhedra-volume-increasing/11@hd.jpg</image:loc>
      <image:title><![CDATA[Aumentare il volume di poliedri convessi]]></image:title>
    </image:image>
    <image:image>
      <image:loc>https://it.etudes.ru/.data/etudes/polyhedra-volume-increasing/11.jpg</image:loc>
      <image:title><![CDATA[Aumentare il volume di poliedri convessi]]></image:title>
    </image:image>
    <image:image>
      <image:loc>https://it.etudes.ru/.data/etudes/polyhedra-volume-increasing/12@fhd.jpg</image:loc>
      <image:title><![CDATA[Aumentare il volume di poliedri convessi]]></image:title>
    </image:image>
    <image:image>
      <image:loc>https://it.etudes.ru/.data/etudes/polyhedra-volume-increasing/12@hd.jpg</image:loc>
      <image:title><![CDATA[Aumentare il volume di poliedri convessi]]></image:title>
    </image:image>
    <image:image>
      <image:loc>https://it.etudes.ru/.data/etudes/polyhedra-volume-increasing/12.jpg</image:loc>
      <image:title><![CDATA[Aumentare il volume di poliedri convessi]]></image:title>
    </image:image>
    <image:image>
      <image:loc>https://it.etudes.ru/.data/etudes/polyhedra-volume-increasing/13@fhd.jpg</image:loc>
      <image:title><![CDATA[Aumentare il volume di poliedri convessi]]></image:title>
    </image:image>
    <image:image>
      <image:loc>https://it.etudes.ru/.data/etudes/polyhedra-volume-increasing/13@hd.jpg</image:loc>
      <image:title><![CDATA[Aumentare il volume di poliedri convessi]]></image:title>
    </image:image>
    <image:image>
      <image:loc>https://it.etudes.ru/.data/etudes/polyhedra-volume-increasing/13.jpg</image:loc>
      <image:title><![CDATA[Aumentare il volume di poliedri convessi]]></image:title>
    </image:image>
    <image:image>
      <image:loc>https://it.etudes.ru/.data/etudes/polyhedra-volume-increasing/14@fhd.jpg</image:loc>
      <image:title><![CDATA[Aumentare il volume di poliedri convessi]]></image:title>
    </image:image>
    <image:image>
      <image:loc>https://it.etudes.ru/.data/etudes/polyhedra-volume-increasing/14@hd.jpg</image:loc>
      <image:title><![CDATA[Aumentare il volume di poliedri convessi]]></image:title>
    </image:image>
    <image:image>
      <image:loc>https://it.etudes.ru/.data/etudes/polyhedra-volume-increasing/14.jpg</image:loc>
      <image:title><![CDATA[Aumentare il volume di poliedri convessi]]></image:title>
    </image:image>
    <image:image>
      <image:loc>https://it.etudes.ru/.data/etudes/polyhedra-volume-increasing/15@fhd.jpg</image:loc>
      <image:title><![CDATA[Aumentare il volume di poliedri convessi]]></image:title>
    </image:image>
    <image:image>
      <image:loc>https://it.etudes.ru/.data/etudes/polyhedra-volume-increasing/15@hd.jpg</image:loc>
      <image:title><![CDATA[Aumentare il volume di poliedri convessi]]></image:title>
    </image:image>
    <image:image>
      <image:loc>https://it.etudes.ru/.data/etudes/polyhedra-volume-increasing/15.jpg</image:loc>
      <image:title><![CDATA[Aumentare il volume di poliedri convessi]]></image:title>
    </image:image>
    <video:video>
      <video:content_loc>https://it.etudes.ru/.data/video/EtudesRu_polyhedra-volume-increasing@fhd.mp4</video:content_loc>
      <video:thumbnail_loc>https://it.etudes.ru/.data/etudes/polyhedra-volume-increasing/thumb@fhd.jpg</video:thumbnail_loc>
      <video:title><![CDATA[Aumentare il volume di poliedri convessi]]></video:title>
      <video:description><![CDATA[Ricordate che forma aveva un pacchetto di latte cinquanta anni fa? È sorprendente che tutta l’Italia comprasse dei pacchetti simili quasi ogni giorno, per più di venti anni, ma pochi ora ricordano precisamente cosa ci fosse scritto sopra. Lo steso avviene per tutta la Russia!]]></video:description>
      <video:duration>377</video:duration>
    </video:video>
  </url>
  <url>
    <loc>https://it.etudes.ru/etudes/</loc>
    <image:image>
      <image:loc>https://it.etudes.ru/.data/etudes/windscreen-wiper/thumb.jpg</image:loc>
      <image:title><![CDATA[Meccanismi a cerniere]]></image:title>
    </image:image>
    <image:image>
      <image:loc>https://it.etudes.ru/.data/etudes/windscreen-wiper/thumb@hd.jpg</image:loc>
      <image:title><![CDATA[Meccanismi a cerniere]]></image:title>
    </image:image>
    <image:image>
      <image:loc>https://it.etudes.ru/.data/etudes/napkin-folding-problem/thumb.jpg</image:loc>
      <image:title><![CDATA[Il rublo ripiegato]]></image:title>
    </image:image>
    <image:image>
      <image:loc>https://it.etudes.ru/.data/etudes/napkin-folding-problem/thumb@hd.jpg</image:loc>
      <image:title><![CDATA[Il rublo ripiegato]]></image:title>
    </image:image>
    <image:image>
      <image:loc>https://it.etudes.ru/.data/etudes/ham-sandwich-theorem/thumb.jpg</image:loc>
      <image:title><![CDATA[Il problema del sandwich]]></image:title>
    </image:image>
    <image:image>
      <image:loc>https://it.etudes.ru/.data/etudes/ham-sandwich-theorem/thumb@hd.jpg</image:loc>
      <image:title><![CDATA[Il problema del sandwich]]></image:title>
    </image:image>
    <image:image>
      <image:loc>https://it.etudes.ru/.data/etudes/continuity/thumb.jpg</image:loc>
      <image:title><![CDATA[Continuità]]></image:title>
    </image:image>
    <image:image>
      <image:loc>https://it.etudes.ru/.data/etudes/continuity/thumb@hd.jpg</image:loc>
      <image:title><![CDATA[Continuità]]></image:title>
    </image:image>
    <image:image>
      <image:loc>https://it.etudes.ru/.data/etudes/vernier/thumb.jpg</image:loc>
      <image:title><![CDATA[Il nonio (verniero)]]></image:title>
    </image:image>
    <image:image>
      <image:loc>https://it.etudes.ru/.data/etudes/vernier/thumb@hd.jpg</image:loc>
      <image:title><![CDATA[Il nonio (verniero)]]></image:title>
    </image:image>
    <image:image>
      <image:loc>https://it.etudes.ru/.data/etudes/pick-theorem/thumb.jpg</image:loc>
      <image:title><![CDATA[La formula di Pick]]></image:title>
    </image:image>
    <image:image>
      <image:loc>https://it.etudes.ru/.data/etudes/pick-theorem/thumb@hd.jpg</image:loc>
      <image:title><![CDATA[La formula di Pick]]></image:title>
    </image:image>
    <image:image>
      <image:loc>https://it.etudes.ru/.data/etudes/pythagorean-theorem/thumb.jpg</image:loc>
      <image:title><![CDATA[Teorema di Pitagora : Puzzle interattivi]]></image:title>
    </image:image>
    <image:image>
      <image:loc>https://it.etudes.ru/.data/etudes/pythagorean-theorem/thumb@hd.jpg</image:loc>
      <image:title><![CDATA[Teorema di Pitagora : Puzzle interattivi]]></image:title>
    </image:image>
    <image:image>
      <image:loc>https://it.etudes.ru/.data/etudes/wheel-inventing/thumb.jpg</image:loc>
      <image:title><![CDATA[Inventare la ruota]]></image:title>
    </image:image>
    <image:image>
      <image:loc>https://it.etudes.ru/.data/etudes/wheel-inventing/thumb@hd.jpg</image:loc>
      <image:title><![CDATA[Inventare la ruota]]></image:title>
    </image:image>
    <image:image>
      <image:loc>https://it.etudes.ru/.data/etudes/catenary/thumb.jpg</image:loc>
      <image:title><![CDATA[Catenaria]]></image:title>
    </image:image>
    <image:image>
      <image:loc>https://it.etudes.ru/.data/etudes/catenary/thumb@hd.jpg</image:loc>
      <image:title><![CDATA[Catenaria]]></image:title>
    </image:image>
    <image:image>
      <image:loc>https://it.etudes.ru/.data/etudes/steering-geometry/thumb.jpg</image:loc>
      <image:title><![CDATA[Geometria dello sterzo]]></image:title>
    </image:image>
    <image:image>
      <image:loc>https://it.etudes.ru/.data/etudes/steering-geometry/thumb@hd.jpg</image:loc>
      <image:title><![CDATA[Geometria dello sterzo]]></image:title>
    </image:image>
    <image:image>
      <image:loc>https://it.etudes.ru/.data/etudes/flexible-polyhedra/thumb.jpg</image:loc>
      <image:title><![CDATA[Poliedri flessibili]]></image:title>
    </image:image>
    <image:image>
      <image:loc>https://it.etudes.ru/.data/etudes/flexible-polyhedra/thumb@hd.jpg</image:loc>
      <image:title><![CDATA[Poliedri flessibili]]></image:title>
    </image:image>
    <image:image>
      <image:loc>https://it.etudes.ru/.data/etudes/monge-theorem/thumb.jpg</image:loc>
      <image:title><![CDATA[Uscire nello spazio]]></image:title>
    </image:image>
    <image:image>
      <image:loc>https://it.etudes.ru/.data/etudes/monge-theorem/thumb@hd.jpg</image:loc>
      <image:title><![CDATA[Uscire nello spazio]]></image:title>
    </image:image>
    <image:image>
      <image:loc>https://it.etudes.ru/.data/etudes/ball-volume/thumb.jpg</image:loc>
      <image:title><![CDATA[Il volume della sfera]]></image:title>
    </image:image>
    <image:image>
      <image:loc>https://it.etudes.ru/.data/etudes/ball-volume/thumb@hd.jpg</image:loc>
      <image:title><![CDATA[Il volume della sfera]]></image:title>
    </image:image>
    <image:image>
      <image:loc>https://it.etudes.ru/.data/etudes/shadows/thumb.jpg</image:loc>
      <image:title><![CDATA[Ombre]]></image:title>
    </image:image>
    <image:image>
      <image:loc>https://it.etudes.ru/.data/etudes/shadows/thumb@hd.jpg</image:loc>
      <image:title><![CDATA[Ombre]]></image:title>
    </image:image>
    <image:image>
      <image:loc>https://it.etudes.ru/.data/etudes/axioms/thumb.jpg</image:loc>
      <image:title><![CDATA[Assiomi]]></image:title>
    </image:image>
    <image:image>
      <image:loc>https://it.etudes.ru/.data/etudes/axioms/thumb@hd.jpg</image:loc>
      <image:title><![CDATA[Assiomi]]></image:title>
    </image:image>
    <image:image>
      <image:loc>https://it.etudes.ru/.data/etudes/translation-rotation/thumb.jpg</image:loc>
      <image:title><![CDATA[Traslazioni e rotazioni]]></image:title>
    </image:image>
    <image:image>
      <image:loc>https://it.etudes.ru/.data/etudes/translation-rotation/thumb@hd.jpg</image:loc>
      <image:title><![CDATA[Traslazioni e rotazioni]]></image:title>
    </image:image>
    <image:image>
      <image:loc>https://it.etudes.ru/.data/etudes/underground/thumb.jpg</image:loc>
      <image:title><![CDATA[A che profondità si trova la stazione del metrò]]></image:title>
    </image:image>
    <image:image>
      <image:loc>https://it.etudes.ru/.data/etudes/underground/thumb@hd.jpg</image:loc>
      <image:title><![CDATA[A che profondità si trova la stazione del metrò]]></image:title>
    </image:image>
    <image:image>
      <image:loc>https://it.etudes.ru/.data/etudes/angle-trisection/thumb.jpg</image:loc>
      <image:title><![CDATA[La trisezione dell’angolo]]></image:title>
    </image:image>
    <image:image>
      <image:loc>https://it.etudes.ru/.data/etudes/angle-trisection/thumb@hd.jpg</image:loc>
      <image:title><![CDATA[La trisezione dell’angolo]]></image:title>
    </image:image>
    <image:image>
      <image:loc>https://it.etudes.ru/.data/etudes/degrees-of-freedom/thumb.jpg</image:loc>
      <image:title><![CDATA[Gradi di libertà]]></image:title>
    </image:image>
    <image:image>
      <image:loc>https://it.etudes.ru/.data/etudes/degrees-of-freedom/thumb@hd.jpg</image:loc>
      <image:title><![CDATA[Gradi di libertà]]></image:title>
    </image:image>
    <image:image>
      <image:loc>https://it.etudes.ru/.data/etudes/lipkin-inversor/thumb.jpg</image:loc>
      <image:title><![CDATA[Il righello di Lipkin]]></image:title>
    </image:image>
    <image:image>
      <image:loc>https://it.etudes.ru/.data/etudes/lipkin-inversor/thumb@hd.jpg</image:loc>
      <image:title><![CDATA[Il righello di Lipkin]]></image:title>
    </image:image>
    <image:image>
      <image:loc>https://it.etudes.ru/.data/etudes/vintage-computers/thumb.jpg</image:loc>
      <image:title><![CDATA[I calcolatori degli anni 1950]]></image:title>
    </image:image>
    <image:image>
      <image:loc>https://it.etudes.ru/.data/etudes/vintage-computers/thumb@hd.jpg</image:loc>
      <image:title><![CDATA[I calcolatori degli anni 1950]]></image:title>
    </image:image>
    <image:image>
      <image:loc>https://it.etudes.ru/.data/etudes/tchebyshev-plantigrade-machine/thumb.jpg</image:loc>
      <image:title><![CDATA[Macchina plantigrada]]></image:title>
    </image:image>
    <image:image>
      <image:loc>https://it.etudes.ru/.data/etudes/tchebyshev-plantigrade-machine/thumb@hd.jpg</image:loc>
      <image:title><![CDATA[Macchina plantigrada]]></image:title>
    </image:image>
    <image:image>
      <image:loc>https://it.etudes.ru/.data/etudes/durer-conjecture/thumb.jpg</image:loc>
      <image:title><![CDATA[Anti-Durer]]></image:title>
    </image:image>
    <image:image>
      <image:loc>https://it.etudes.ru/.data/etudes/durer-conjecture/thumb@hd.jpg</image:loc>
      <image:title><![CDATA[Anti-Durer]]></image:title>
    </image:image>
    <image:image>
      <image:loc>https://it.etudes.ru/.data/etudes/ray-screening/thumb.jpg</image:loc>
      <image:title><![CDATA[Intrappolare i raggi di luce]]></image:title>
    </image:image>
    <image:image>
      <image:loc>https://it.etudes.ru/.data/etudes/ray-screening/thumb@hd.jpg</image:loc>
      <image:title><![CDATA[Intrappolare i raggi di luce]]></image:title>
    </image:image>
    <image:image>
      <image:loc>https://it.etudes.ru/.data/etudes/corner-reflector/thumb.jpg</image:loc>
      <image:title><![CDATA[Specchi angolari]]></image:title>
    </image:image>
    <image:image>
      <image:loc>https://it.etudes.ru/.data/etudes/corner-reflector/thumb@hd.jpg</image:loc>
      <image:title><![CDATA[Specchi angolari]]></image:title>
    </image:image>
    <image:image>
      <image:loc>https://it.etudes.ru/.data/etudes/geodesic/thumb.jpg</image:loc>
      <image:title><![CDATA[Il percorso più breve]]></image:title>
    </image:image>
    <image:image>
      <image:loc>https://it.etudes.ru/.data/etudes/geodesic/thumb@hd.jpg</image:loc>
      <image:title><![CDATA[Il percorso più breve]]></image:title>
    </image:image>
    <image:image>
      <image:loc>https://it.etudes.ru/.data/etudes/drilling-square-holes/thumb.jpg</image:loc>
      <image:title><![CDATA[Fare dei fori quadrati]]></image:title>
    </image:image>
    <image:image>
      <image:loc>https://it.etudes.ru/.data/etudes/drilling-square-holes/thumb@hd.jpg</image:loc>
      <image:title><![CDATA[Fare dei fori quadrati]]></image:title>
    </image:image>
    <image:image>
      <image:loc>https://it.etudes.ru/.data/etudes/polyhedra-development/thumb.jpg</image:loc>
      <image:title><![CDATA[E quest’altro sviluppo?!]]></image:title>
    </image:image>
    <image:image>
      <image:loc>https://it.etudes.ru/.data/etudes/polyhedra-development/thumb@hd.jpg</image:loc>
      <image:title><![CDATA[E quest’altro sviluppo?!]]></image:title>
    </image:image>
    <image:image>
      <image:loc>https://it.etudes.ru/.data/etudes/cycloid/thumb.jpg</image:loc>
      <image:title><![CDATA[La cicloide]]></image:title>
    </image:image>
    <image:image>
      <image:loc>https://it.etudes.ru/.data/etudes/cycloid/thumb@hd.jpg</image:loc>
      <image:title><![CDATA[La cicloide]]></image:title>
    </image:image>
    <image:image>
      <image:loc>https://it.etudes.ru/.data/etudes/ellipse/thumb.jpg</image:loc>
      <image:title><![CDATA[Ellisse]]></image:title>
    </image:image>
    <image:image>
      <image:loc>https://it.etudes.ru/.data/etudes/ellipse/thumb@hd.jpg</image:loc>
      <image:title><![CDATA[Ellisse]]></image:title>
    </image:image>
    <image:image>
      <image:loc>https://it.etudes.ru/.data/etudes/polyhedra-net/thumb.jpg</image:loc>
      <image:title><![CDATA[Lo sviluppo]]></image:title>
    </image:image>
    <image:image>
      <image:loc>https://it.etudes.ru/.data/etudes/polyhedra-net/thumb@hd.jpg</image:loc>
      <image:title><![CDATA[Lo sviluppo]]></image:title>
    </image:image>
    <image:image>
      <image:loc>https://it.etudes.ru/.data/etudes/parabolic-antenna/thumb.jpg</image:loc>
      <image:title><![CDATA[L’antenna parabolica]]></image:title>
    </image:image>
    <image:image>
      <image:loc>https://it.etudes.ru/.data/etudes/parabolic-antenna/thumb@hd.jpg</image:loc>
      <image:title><![CDATA[L’antenna parabolica]]></image:title>
    </image:image>
    <image:image>
      <image:loc>https://it.etudes.ru/.data/etudes/cubic-parquet/thumb.jpg</image:loc>
      <image:title><![CDATA[Un parquet cubistico]]></image:title>
    </image:image>
    <image:image>
      <image:loc>https://it.etudes.ru/.data/etudes/cubic-parquet/thumb@hd.jpg</image:loc>
      <image:title><![CDATA[Un parquet cubistico]]></image:title>
    </image:image>
    <image:image>
      <image:loc>https://it.etudes.ru/.data/etudes/polyhedra-embedding/thumb.jpg</image:loc>
      <image:title><![CDATA[Solidi a facce ricurve con lo stesso sviluppo di poliedri]]></image:title>
    </image:image>
    <image:image>
      <image:loc>https://it.etudes.ru/.data/etudes/polyhedra-embedding/thumb@hd.jpg</image:loc>
      <image:title><![CDATA[Solidi a facce ricurve con lo stesso sviluppo di poliedri]]></image:title>
    </image:image>
    <image:image>
      <image:loc>https://it.etudes.ru/.data/etudes/figures-area/thumb.jpg</image:loc>
      <image:title><![CDATA[L’area delle figure piane]]></image:title>
    </image:image>
    <image:image>
      <image:loc>https://it.etudes.ru/.data/etudes/figures-area/thumb@hd.jpg</image:loc>
      <image:title><![CDATA[L’area delle figure piane]]></image:title>
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    <image:image>
      <image:loc>https://it.etudes.ru/.data/etudes/fold-cut-problem/thumb.jpg</image:loc>
      <image:title><![CDATA[Con un solo taglio]]></image:title>
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    <image:image>
      <image:loc>https://it.etudes.ru/.data/etudes/fold-cut-problem/thumb@hd.jpg</image:loc>
      <image:title><![CDATA[Con un solo taglio]]></image:title>
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    <image:image>
      <image:loc>https://it.etudes.ru/.data/etudes/reuleaux-triangle/thumb.jpg</image:loc>
      <image:title><![CDATA[Il triangolo curvo di Reuleaux]]></image:title>
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    <image:image>
      <image:loc>https://it.etudes.ru/.data/etudes/reuleaux-triangle/thumb@hd.jpg</image:loc>
      <image:title><![CDATA[Il triangolo curvo di Reuleaux]]></image:title>
    </image:image>
    <image:image>
      <image:loc>https://it.etudes.ru/.data/etudes/polyhedra-volumes/thumb.jpg</image:loc>
      <image:title><![CDATA[Aumentare il volume di poliedri convessi]]></image:title>
    </image:image>
    <image:image>
      <image:loc>https://it.etudes.ru/.data/etudes/polyhedra-volumes/thumb@hd.jpg</image:loc>
      <image:title><![CDATA[Aumentare il volume di poliedri convessi]]></image:title>
    </image:image>
    <image:image>
      <image:loc>https://it.etudes.ru/.data/etudes/polyhedra-volume-increasing/thumb.jpg</image:loc>
      <image:title><![CDATA[Aumentare il volume di poliedri convessi]]></image:title>
    </image:image>
    <image:image>
      <image:loc>https://it.etudes.ru/.data/etudes/polyhedra-volume-increasing/thumb@hd.jpg</image:loc>
      <image:title><![CDATA[Aumentare il volume di poliedri convessi]]></image:title>
    </image:image>
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