You would need to find the perimeter of a bulletin board if you want to add a decorative border to the bulletin board. The perimeter would tell you how much of the decorative material to buy. You would need to find the area of a bulletin board if you want to cover the bulletin board in paper. The area would tell you how much paper will be required.
Work Step by Step
Perimeter and area are often needed to calculate how much material is needed for a project.