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A proof without words for the Pythagorean theorem (Zhou Bi Suan Jing).

http://upload.wikimedia.org/wikipedia/commons/c/c3/Chinese_pythagoras.jpg

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A proof without words for the Pythagorean theorem (Zhou Bi Suan Jing).

http://upload.wikimedia.org/wikipedia/commons/c/c3/Chinese_pythagoras.jpg