# The area of a square is 81 square centimeters. First, how do you find the length of a side Then find the length of the diagonal?

##### 1 Answer

Jan 12, 2017

The length of a side is

#### Explanation:

The formula for area of a square is:

Hence:

Since

Since the diagonal of a square is the hypotenuse of a right-angled triangle formed by two adjacent sides, we can calculate the length of the diagonal using the Pythagorean Theorem: