# Why Is the Pythagorean Theorem So Useful?

Updated: Aug 31, 2022

Author: Kelly Zeng

Editor: Kira Tian and He-Hanson Xuan

Artist: Susan Wu

The Pythagorean Theorem, a groundbreaking mathematical discovery, was named after Pythagoras, one of the most famous and controversial ancient Greek philosophers. The theorem states that the area of the square built upon the hypotenuse of a right triangle is equal to the sum of the areas of the squares upon the remaining sides. Thus, the formula a^2 + b^2 = c^2 was derived in which a and b are the lengths of the two legs, and c is the length of the hypotenuse.

The Pythagorean theorem is one of the