The sides of right-angled triangles are labelled opposite, hypotenuse and adjacent ... Image caption, These three equations are true for all right-angled triangles. They are known as the three ...

One idea he came up with was a mathematical equation that's used all the time ... 90°), the sum of the squares of two sides equals the square of the hypotenuse (the longest side).

The Pythagorean theorem has been a cornerstone of mathematics for over two millennia. It is used to calculate the length of a side ... hypotenuse. Despite thousands of existing proofs, all known ...