https://commons.wikimedia.org/wiki/File:Illustration_to_Euclid%27s_proof_of_the_Pythagorean_theorem3.PNG

English: Third illustration of a series showing Euclid's proof
Date	12 May 2010
Source	Own work
Author	Brews ohare

Original filename:
https://upload.wikimedia.org/wikipedia/commons/9/91/Illustration_to_Euclid%27s_proof_of_the_Pythagorean_theorem3.PNG