Squares
We're given a square's area, and we need to find the perimeter. But to do that, we will need the side length.
And to find the side length, I'll rearrange the formula for the side length.
A = a²
√A = a
√64 = a
8 = a
So the side length is 8. Now, find the perimeter by multiplying the side length by 4:
P = 4a
P = 4 * 8
P = 32 cm
Therefore, P = 32 cm.