### Home > CCA2 > Chapter A > Lesson A.2.1 > ProblemA-48

A-48.

The area of a square is $225$ square centimeters. Homework Help ✎

1. Make a diagram and determine the length of each side.

Find the length of one of the sides of the square and use the sides to find the diagonal.

$\sqrt{225}=15\text{ cm}$

2. Use the Pythagorean Theorem to find the length of its diagonal.

The Pythagorean Theorem is the following: $a^2 + b^2 = c^2$

The length of the diagonal is

$15\sqrt{2}$