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Euclid's proof diagram for the Pythagorean theorem.

作成者:
K-Arai
The area of square ACFG is equals to the area of rectangle CJKE. Click the play button at left below corner of the graphics view, equal area transits as {Area of square ACFG}/2={ΔACF}⇒{ΔBCF}⇒{ΔACE}⇒{ΔCEJ}={Area of rectangle CJKE}/2. Similarly the area of square BAHI is equals to the area of rectangle BDKJ.