Sadie computes the perimeter of a rectangle by adding the length, I, and width, w, and doubling this sum. Eric computes the perimeter of a rectangle by doubling the length, I, doubling the width, w, and adding the doubled amounts. Explain why Sadie and Eric always get the same answer, no matter what the length and width of the rectangle are. plz help i really need it I need to turn this in tomorrow.