[math-fun] Exhibit for MoMath?

Doug Hofstadter found this nice YouTube: http://www.youtube.com/watch?v=CAkMUdeB06o&sns=em Regardless of its rigor, it makes the statement of the theorem unmistakable and unforgettable. Perhaps adjacent could be the isosceles case, in case anyone thinks it only works for 3-4-5, and the equilateral and obtuse cases, with just enough liquid for the "largest" square, failing dissimilarly. --rwg