It is not impossible. You can get the perimeter from area very easily. First, you find the square root of the area, which will be the length of each side (assuming it is a square). Then, once you've found the length of each side, you multiply it by 4, and you should have the perimeter.t is not impossible. You can get the perimeter from area very easily. First, you find the square root of the area, which will be the length of each side (assuming it is a square). Then, once you've found the length of each side, you multiply it by 4, and you should have the perimeter.