Marian wants to build a fence around a square garden in her backyard. If the area of he garden is going to be 225 ft2, how much fencing, in ft., does Marian need?
Area of a square = side^2
225 ft^2 = side^2 take the positive square root of both sides
sqrt ( 225 ft^2) = sqrt (side^2)
15 ft = side
And the perimeter of a square = 4*side = 4*15 = 60 ft needed