<a href="https://en.wikipedia.org/wiki/Pi" class="extiw" title="w:Pi">Pi</a> approximation<br><i>This is hardly how Archimedes approximated Pi, he didn't go from regular pentagon to hexagon to octagon,</i>
<dl><dd>but started with a regular hexagon and doubled the number of sides<i>.</i></dd></dl>
<div style="display:inline-block;padding:0 3px;background-color:#BDC"><a href="//commons.wikimedia.org/wiki/File:Archimedes_pi.png" title="File:Archimedes pi.png"><b>Original: </b></a></div> <div style="display:inline-block;padding:3px 0;"><a href="//commons.wikimedia.org/wiki/User:Fredrik" title="User:Fredrik">Fredrik</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:Leafnode" title="User:Leafnode">Leszek Krupinski</a></div>
Own work based on: <a href="//commons.wikimedia.org/wiki/File:Archimedes_pi.png" title="File:Archimedes pi.png">Archimedes pi.png</a>: <a href="//commons.wikimedia.org/wiki/File:Archimedes_pi.png" class="image"><img alt="Archimedes pi.png" src="https://upload.wikimedia.org/wikipedia/commons/thumb/0/03/Archimedes_pi.png/32px-Archimedes_pi.png" decoding="async" width="32" height="11" class="thumbborder" srcset="https://upload.wikimedia.org/wikipedia/commons/thumb/0/03/Archimedes_pi.png/48px-Archimedes_pi.png 1.5x, https://upload.wikimedia.org/wikipedia/commons/thumb/0/03/Archimedes_pi.png/64px-Archimedes_pi.png 2x" data-file-width="707" data-file-height="238"></a> <i>by</i> <a href="//commons.wikimedia.org/wiki/User:Fredrik" title="User:Fredrik">Fredrik</a>