
What do Euclid, 12-year-old Albert Einstein, and American President James A. Garfield have in common?
They all came up with elegant proofs for the famous Pythagorean theorem:
In mathematics, the Pythagorean theorem, also known as Pythagoras’s theorem, is a fundamental relation in Euclidean geometry among the three sides of a right triangle. It states that the square of the hypotenuse (the side opposite the right angle) is equal to the sum of the squares of the other two sides.

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What do Euclid, 12-year-old Albert Einstein, and American President James A. Garfield have in common?
Source:https://www.facebook.com/TEDEducation/videos/1742518602428005/