The Pythagorean Theorem relates the lengths of the sides of a right triangle. A right triangle has one angle that is 90∘. The theorem states that:
a²+b²=c²
where:
c is the length of the hypotenuse (the side opposite the right angle),
a and b are the lengths of the other two sides
Hypotenuse: The longest side of a right triangle.
Legs: The two shorter sides of a right triangle.