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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>
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    <image:image>
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      <image:title><![CDATA[]]></image:title>
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      <image:title><![CDATA[]]></image:title>
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      <image:title><![CDATA[]]></image:title>
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