How to use the Pythagorean Theorem

a² + b² = c² is the formula for pythagorean theorem.

it is used to find out the hypotenuse (the side opposite the 90° angle) of a right angled triangle.

the two sides adjacent to the 90° angles are 'a' and 'c'. the theory is that if you add the squares of a and b, the hypotenuse is equal to c².