Suppose the area of a square 16 yards. find the perimeter of the square. part 1: use the formula for the area of a square, (a=s^2 , where s is the side length of a square) to find the measure of one side. part 2: recall that the perimeter of a square is the distance around it. use your answer from part one and the formula p=4s to find the perimeter of the square.