# How would I use the Pythagorean Theorem to determine if a triangle with sides measuring the following is a right triangle: #8, 5, 9#?

##### 1 Answer

Nov 18, 2015

The way to check if the triangle is right is to check if

#### Explanation:

According to Pythagorean Theorem A triangle is right-angled if and only if

So we check if:

Since **not** right-angled.