# How do you use the Pythagorean Theorem to determine if the three sides are a right triangle: 15 m, 12 m, 9m?

##### 1 Answer

May 17, 2015

We need to check that the sum of the squares of the lengths of the two shorter sides is equal to the square of the length of the longest side.

Actually, we could have noticed that all the sides are a multiple of 3m, namely