Question

1. what is the side length, s, of the square? a = 81 m²

Explanation:

Step1: Recall area formula for square

The area formula of a square is $A = s^{2}$, where $A$ is the area and $s$ is the side - length.

Step2: Solve for side - length

Given $A = 81m^{2}$, we have $s^{2}=81$. Taking the square root of both sides, $s=\sqrt{81}$. Since the side - length of a square cannot be negative, $s = 9m$.

Answer:

$9m$