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Pythagorean theorem

In mathematics, the Pythagorean theorem, also known as Pythagoras' 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. The theorem can be written as an equation relating the lengths of the sides a, b and c, often called the "Pythagorean equation":

where c represents the length of the hypotenuse and a and b the lengths of the triangle's other two sides.

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The Pythagorean Theorem explained with origami, by Vi Heart. This young mathematician explains mathematical concepts using concrete and fun illustration. She encourages viewers to think for themselves, not to just believe what they are taught without questioning it. I enjoy these videos and think they are great teaching tools.

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