Pythagoras was a Greek philosopher who made important developments in mathematics, astronomy, and the theory of music. He was also a philosopher who taught that numbers were the essence of all things. He associated numbers with virtues, colors, music and other qualities. and
The theorem of him says that in a right triangle, the square of the hypotenuse equals the sum of the squares of the other two sides. A right triangle is a triangle where one angle equals 90 degrees and the hypotenuse is the side opposite the right angle. If you know the values of two sides of a right triangle, you can easily calculate the missing side