File talk:Pythagoras-2a.gif

Origin of the proof

According to the Pythagorean theorem article, this proof appeared in Cut the Knot, which referenced the book Proofs without Words: Exercises in Visual Thinking by Roger B. Nelsen. If the name of the person(s) who formulated the proof is known, would it be useful if it were included in the description of the animation and the caption of the Featured Picture? cmɢʟee'τaʟκ'maιʟ 09:52, 9 October 2011 (UTC)