Question

relate the area of the square to the length of each side. a = 9 cm² side length side length × 3 cm = √9

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 $A = 9\ cm^2$, we have $s^2=9$. Taking the square root of both sides, $s=\sqrt{9}=3\ cm$.

Answer:

$3$