Question

to find the area of a square...
a = s²
a = (9 ft)²
a = 81 ft²
9 feet
...square the length of the sides.
find the area of the square.
a = ft²

Explanation:

Step1: Recall square area formula

$A = s^2$

Step2: Substitute side length $s=9$ ft

$A = (9\ \text{ft})^2$

Step3: Calculate the square

$A = 9 \times 9 = 81\ \text{ft}^2$

Answer:

$81$