Answer:
12inches
Step-by-step explanation
Area of a square A = L^2
L is the side length
Given
Area of the square = 9sq. in
Substitute the given value into the formula and find L
9 = L^2
Swap
L^2 = 9
L = \sqrt{9}
L = 3units
Get the perimeter
Perimeter of the square = 4L
Perimeter of the square = 4(3)
Perimeter of the square = 12in
Hence the Perimeter of the square is 12inches