### Home > CCG > Chapter 3 > Lesson 3.2.3 > Problem3-81

3-81.

Explain why the shapes below are similar.

$\text{Perimeter}=26 \; \text{m}$

$\text{Area} = 36 \; \text{sq. in.}$

• Use the area and perimeter to find the lengths of the unknown sides. What must be true about these lengths for the rectangles to be similar?