Question

the area of a square can be found using the equation $a = s^2$, where $a$ is the area and $s$ is the measure of one side of the square.
match the equation for how to solve for the side length of a square to its description.
a square has an area of $81$ $in^2$.
$s = \sqrt{81^2}$ in.
$s = \sqrt{81}$ in.
$s = 81^2$ in.
$s = 81$ in.

Explanation:

Step1: Recall area formula for square

$A = s^2$

Step2: Isolate side length $s$

$s = \sqrt{A}$

Step3: Substitute $A=81$ in²

$s = \sqrt{81}$ in.

Step4: Calculate the square root

$s = 9$ in. (matches $s=\sqrt{81}$ in.)

Answer:

$s = \sqrt{81}$ in.