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Author:
Natalie Aristor

https://www.khanacademy.org/ma...

the Pythagorean theorem, relation in 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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The longest side of the triangle is called the "hypotenuse", so the formal definition is: In a right angled triangle: the square of the hypotenuse is equal to. the sum of the squares of the other two sides.

Source: Khan Academy