A right triangle has 2 legs and a hypotenuse.
The Pythagorean Theorem on a right triangle:
a² + b² = c²
a and b are the 2 legs of the right triangle
c is the hypotenuse of the right triangle.
The Pythagorean Theorem states the relationship of the lengths of the legs of the right triangle to the length of its hypotenuse.
The sum of the squares of both legs is equal to the square of the hypotenuse.