Archimedes' midpoint theorem
Vectorised by <a href="//commons.wikimedia.org/wiki/User:KCVelaga" title="User:KCVelaga">User:KCVelaga</a>, from the work by <a href="//commons.wikimedia.org/wiki/User:Burn~commonswiki" class="mw-redirect" title="User:Burn~commonswiki">User:Burn~commonswiki</a>
<a href="//commons.wikimedia.org/wiki/File:Archimedes%27_midpt_theorem.png" title="File:Archimedes' midpt theorem.png">File:Archimedes' midpt theorem.png</a>