The Pythagorean Theorem

The actual definition of the Pythagorean Theorem is, Relation in geometry among the three sides of a right triangle.

What I understand from it, is that the Pythagorean Theorem is a way of showing the relationship of the three sides of a right triangle. It is a way of saying that the two legs that form the right angle squared, when added, give you the hypotenuse of a right triangle. The hypotenuse is those two squared sides squared. The equation to solve it is A2 + B2 = C2, A and B being the two legs that form the right angle, and C the Hypotenuse of the triangle. The Pythagorean Theorem is the way of showing the relationship of the triangle's legs.