Area is L * W
In a square, it’s just S * S or Side * Side.
Since both sides are the same length, we need to find two values that multiply to be 144. 12 is the square root of 144, so 12 * 12 is 144, and are also the side lengths we are looking for. So the side length of this square is 12. There are 4 sides to this pillow, so 12 * 4 will give us the perimeter. 12 * 4 = 48. So each side length added together is 48 in total and therefore, Sonya needs 48 inches of ribbon.
