It is useful to think of Pythagoras’ theorem as \(a\)² + \(b\)² = \(c\)². The hypotenuse is labelled as \(c\) and the other two sides labelled as \(a\) and \(b\). This makes the areas of the ...

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