In this example, we design an algorithm to find the perimeter and area of a rectangle. To find the perimeter and area of a rectangle, you need to know the rectangle's length and width. The perimeter and area of the rectangle arc then given by the following formulas: Perimeter = 2 middot (length + width) area = length middot width The algorithm to find the perimeter and area of the rectangle is: Get the length of the rectangle. Get the width of the rectangle. Find the perimeter using the following equation: perimeter = 2 middot (length + width) Find the area using the following equation