Man Teaches Math to Struggling Stranger on Subway Ride: 'They Left Each Other with a Gift' The Pythagorean Theorem states that three sides of a right-angled triangle can be expressed by the ...

Save guides, add subjects and pick up where you left off with your BBC account. The longest side of a right-angled triangle is the hypotenuse. The hypotenuse is always opposite the right angle.

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For two millennia, mathematicians have shown the Pythagorean theorem to be true through geometry and algebra, never ...

"Shang Gao's proof of the Pythagorean theorem is a scientific fact that deserves recognition," Zhou told Science and ...