Question

*21. the perimeter of a square room is 80 feet. the area of the room is how many square feet? draw a square to help you. answer:

Explanation:

Step1: Find side length of square

A square has 4 equal sides, so divide perimeter by 4.
$\text{Side length} = \frac{80}{4} = 20$ feet

Step2: Calculate area of square

Area of a square is side length squared.
$\text{Area} = 20^2 = 400$ square feet

Answer:

400 square feet