A trapezium (or <a href="https://en.wikipedia.org/wiki/trapezoid" class="extiw" title="w:trapezoid">trapezoid</a>).
<div style="display:inline-block;padding:0 3px;background-color:#CCF">Original:</div> <div style="display:inline-block;padding:3px 0;"><a href="https://fr.wikipedia.org/wiki/User:Aoineko" class="extiw" title="fr:User:Aoineko">Aoineko</a></div> <div style="display:inline-block;padding:0 3px;background-color:#CCF">Vector: </div> <div style="display:inline-block;"><a href="//commons.wikimedia.org/wiki/User:Tryphon" title="User:Tryphon">Tryphon</a></div>
2008-12-20
Own work based on: <a href="//commons.wikimedia.org/wiki/File:Geometrie_trapeze.png" title="File:Geometrie trapeze.png">Geometrie trapeze.png</a>