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      <title>Introduzione alla geometria ellittica by Martina Samperi</title>
      <link>https://padlet.com/marty14598/1ij31u1y933j</link>
      <description></description>
      <language>en-us</language>
      <pubDate>2017-12-01 17:57:23 UTC</pubDate>
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         <title>La geometria ellittica è un tipo di geometria che si basa sulla sfera; </title>
         <author>marty14598</author>
         <link>https://padlet.com/marty14598/1ij31u1y933j/wish/212377566</link>
         <description><![CDATA[]]></description>
         <enclosure url="http://www.adrianopiacentini.it/dipinti/triangolo%20ellittico.png" />
         <pubDate>2017-12-01 17:59:42 UTC</pubDate>
         <guid>https://padlet.com/marty14598/1ij31u1y933j/wish/212377566</guid>
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      <item>
         <title>IL V postulato di Euclide</title>
         <author>marty14598</author>
         <link>https://padlet.com/marty14598/1ij31u1y933j/wish/212382755</link>
         <description><![CDATA[<div><strong>Si ottiene negando il 5° postulato di Euclide.</strong></div>]]></description>
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         <pubDate>2017-12-01 18:11:52 UTC</pubDate>
         <guid>https://padlet.com/marty14598/1ij31u1y933j/wish/212382755</guid>
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      <item>
         <title>RETTA O GEODETICA</title>
         <author>marty14598</author>
         <link>https://padlet.com/marty14598/1ij31u1y933j/wish/212383505</link>
         <description><![CDATA[<div>si definisce retta(dal punto di vista intrinseco) o geodetica(dal punto di vista estrinseco) un percorso minimo tra 2 punti qualsiasi di una superficie.</div>]]></description>
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         <pubDate>2017-12-01 18:13:42 UTC</pubDate>
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      <item>
         <title></title>
         <author>marty14598</author>
         <link>https://padlet.com/marty14598/1ij31u1y933j/wish/212387912</link>
         <description><![CDATA[ ]]></description>
         <pubDate>2017-12-01 18:24:22 UTC</pubDate>
         <guid>https://padlet.com/marty14598/1ij31u1y933j/wish/212387912</guid>
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      <item>
         <title>GLI ANTIPODALI</title>
         <author>marty14598</author>
         <link>https://padlet.com/marty14598/1ij31u1y933j/wish/212389993</link>
         <description><![CDATA[<div>Si definiscono antipodali ciascuno dei punti della sfera diametralmente opposti.</div>]]></description>
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         <pubDate>2017-12-01 18:28:44 UTC</pubDate>
         <guid>https://padlet.com/marty14598/1ij31u1y933j/wish/212389993</guid>
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      <item>
         <title>CIRCONFERENZA MASSIMA</title>
         <author>marty14598</author>
         <link>https://padlet.com/marty14598/1ij31u1y933j/wish/212395025</link>
         <description><![CDATA[<div>La circonferenza massima è l'intersezione di un piano   passante per il centro della sfera con la sfera.</div>]]></description>
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         <pubDate>2017-12-01 18:38:09 UTC</pubDate>
         <guid>https://padlet.com/marty14598/1ij31u1y933j/wish/212395025</guid>
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      <item>
         <title>SE TRADUCIAMO I POSTULATI DI EUCLIDE SU UNA SUPERFICIE SFERICA OSSERVIAMO CHE:</title>
         <author>marty14598</author>
         <link>https://padlet.com/marty14598/1ij31u1y933j/wish/212396664</link>
         <description><![CDATA[]]></description>
         <enclosure url="" />
         <pubDate>2017-12-01 18:41:45 UTC</pubDate>
         <guid>https://padlet.com/marty14598/1ij31u1y933j/wish/212396664</guid>
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      <item>
         <title></title>
         <author>marty14598</author>
         <link>https://padlet.com/marty14598/1ij31u1y933j/wish/212398986</link>
         <description><![CDATA[<div>1)Per 2 punti passa una sola retta</div>]]></description>
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         <pubDate>2017-12-01 18:46:41 UTC</pubDate>
         <guid>https://padlet.com/marty14598/1ij31u1y933j/wish/212398986</guid>
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      <item>
         <title></title>
         <author>marty14598</author>
         <link>https://padlet.com/marty14598/1ij31u1y933j/wish/212399950</link>
         <description><![CDATA[<div>3)Tutti gli angoli retti sono congruenti.</div>]]></description>
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         <pubDate>2017-12-01 18:48:49 UTC</pubDate>
         <guid>https://padlet.com/marty14598/1ij31u1y933j/wish/212399950</guid>
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      <item>
         <title></title>
         <author>marty14598</author>
         <link>https://padlet.com/marty14598/1ij31u1y933j/wish/212400525</link>
         <description><![CDATA[<div>4)Dato un centro e un raggio NON si può costruire una circonferenza DI RAGGIO INFINITO</div>]]></description>
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         <pubDate>2017-12-01 18:50:06 UTC</pubDate>
         <guid>https://padlet.com/marty14598/1ij31u1y933j/wish/212400525</guid>
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      <item>
         <title>é stata ideata dal matematico Bernhard Riemann</title>
         <author>marty14598</author>
         <link>https://padlet.com/marty14598/1ij31u1y933j/wish/212419817</link>
         <description><![CDATA[]]></description>
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         <pubDate>2017-12-01 19:29:31 UTC</pubDate>
         <guid>https://padlet.com/marty14598/1ij31u1y933j/wish/212419817</guid>
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      <item>
         <title>Non esiste una retta parallela ad un&#39;altra</title>
         <author>marty14598</author>
         <link>https://padlet.com/marty14598/1ij31u1y933j/wish/212422243</link>
         <description><![CDATA[<div>Infatti il cerchio rosso é una retta, a differenza del cerchio blu.</div>]]></description>
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         <pubDate>2017-12-01 19:35:18 UTC</pubDate>
         <guid>https://padlet.com/marty14598/1ij31u1y933j/wish/212422243</guid>
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      <item>
         <title></title>
         <author>marty14598</author>
         <link>https://padlet.com/marty14598/1ij31u1y933j/wish/214775452</link>
         <description><![CDATA[]]></description>
         <enclosure url="" />
         <pubDate>2017-12-10 09:40:00 UTC</pubDate>
         <guid>https://padlet.com/marty14598/1ij31u1y933j/wish/214775452</guid>
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      <item>
         <title></title>
         <author>marty14598</author>
         <link>https://padlet.com/marty14598/1ij31u1y933j/wish/214775568</link>
         <description><![CDATA[<div>2)Un segmento NON può essere prolungato indefinitamente.</div>]]></description>
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         <pubDate>2017-12-10 09:41:19 UTC</pubDate>
         <guid>https://padlet.com/marty14598/1ij31u1y933j/wish/214775568</guid>
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      <item>
         <title>DEFINIZIONI</title>
         <author>marty14598</author>
         <link>https://padlet.com/marty14598/1ij31u1y933j/wish/214775772</link>
         <description><![CDATA[]]></description>
         <enclosure url="" />
         <pubDate>2017-12-10 09:43:19 UTC</pubDate>
         <guid>https://padlet.com/marty14598/1ij31u1y933j/wish/214775772</guid>
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      <item>
         <title></title>
         <author>marty14598</author>
         <link>https://padlet.com/marty14598/1ij31u1y933j/wish/214804364</link>
         <description><![CDATA[]]></description>
         <enclosure url="http://www.appuntimania.com/files/matematica/219_poze/image002.jpg" />
         <pubDate>2017-12-10 14:41:54 UTC</pubDate>
         <guid>https://padlet.com/marty14598/1ij31u1y933j/wish/214804364</guid>
      </item>
      <item>
         <title>Come nella geometria euclidea, si ha che:</title>
         <author>marty14598</author>
         <link>https://padlet.com/marty14598/1ij31u1y933j/wish/214806619</link>
         <description><![CDATA[<div>-Per un punto passano infinite rette<br>-Per due punti passa una e una sola retta.<br>Ma a differenza della geometria euclidea: <br>- le rette sono linee chiuse e finite, ciò ne consegue che un punto P può muoversi indefinitamente su di esse, ma è destinato a riassumere le stesse posizioni;<br>- due rette ellittiche si incontreranno sempre in uno e un solo punto (due circonferenze massime si intersecano in due punti euclidei antipodali, ma nel modello della geometria ellittica corrispondono ad un unico punto).<br>- Tutte le perpendicolari ad una retta passano per una stessa coppia di punti diametralmente opposti.</div>]]></description>
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         <pubDate>2017-12-10 15:03:00 UTC</pubDate>
         <guid>https://padlet.com/marty14598/1ij31u1y933j/wish/214806619</guid>
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