This  <a href="https://en.wikipedia.org/wiki/Vector_images" class="extiw" title="w:Vector images">vector image</a> was created with <a href="https://en.wikipedia.org/wiki/GeoGebra" class="extiw" title="w:GeoGebra">GeoGebra</a>.
Desta versão: <a href="https://en.wikibooks.org/wiki/pt:User:Helder.wiki" class="extiw" title="b:pt:User:Helder.wiki">Helder</a>. Da versão original: <a href="//commons.wikimedia.org/w/index.php?title=User:Silv%C3%A9rio_dos_Reis&amp;action=edit&amp;redlink=1" class="new" title="User:Silvério dos Reis (page does not exist)">Silvério dos Reis</a>
2008-05-27
<span class="int-own-work" lang="en">Own work</span>