Perimeter

Definition

The perimeter of a geometric figure is the distance around the edge of the figure. Perimeter is often denoted by P. The perimeter of a circle is called its circumference.

Formulas

• Square - 4s, where s is the side length

• Rectangle - 2(l+w), where l is the length and w is the width

• Circle - , where r is the radius

• Regular geometric figure with n sides - ns, where s is the length of the side

Introductory Example Problems

• 2006 AMC 10B Problem 6