Question

1. a square has area $9\\ \text{cm}^2$. how long are its sides?

a. 3 cm
b. 4.5 cm
c. 9 cm
d. 81 cm

Explanation:

Step1: Recall square area formula

The area $A$ of a square is $A = s^2$, where $s$ is side length.

Step2: Solve for side length

Rearrange formula: $s = \sqrt{A}$
Substitute $A=9$: $s = \sqrt{9}$

Step3: Calculate the square root

$\sqrt{9} = 3$

Answer:

A. 3 cm