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0falsefalse Source: Chinese Pythagorean theorem, from page 22 of Joseph Needham's Science and Civilization in China: Volume 3, Mathematics and the Sciences
A sketch of a proof to the Pythagorean Theorem drawn by me using MS-Paint. The size of the bigger square is both ( a + b ) 2 {\displaystyle \ \left(a+b\right)^{2}}