Perimeter
PERIMETER • The distance around a figure (polygon). • The perimeter of any polygon can be found by adding the measures of the sides of the polygon, if they are given in the same unit. • When you find the perimeter of a figure, the length and the width must be in the same units. 1. If the dimensions of a figure are in inches, the perimeter will be in inches. 2. If the dimensions of a figure are in centimeters, the perimeter will be in centimeters. 3. If the dimensions of a figure are in feet, the perimeter will be in feet. • Finding the perimeter of any polygon is based on addition of measures. • The perimeter of some polygons can be expressed by a formula. 1. PERIMETER OF A RECTANGLE: Perimeter = 2 x Length + 2 x Width or P = 2 x L + 2 x W or P = 2 x (L + W)
2. PERIMETER OF A SQUARE: Perimeter = 4 x length of one side or P = S + S + S + S or P = 4S 3. PERIMETER OF A TRIANGLE: Perimeter = Side + Side + Side or P = S + S + S