Draft for the proof of Thales theorem. The diameter AC was drawn. Additionally one point on the circle which gets a triangle iwth the diameter was drawn.
<a href="//commons.wikimedia.org/wiki/User:MartinThoma" title="User:MartinThoma">MartinThoma</a>
2014-10-04
<span class="int-own-work" lang="en">Own work</span>