PerimeterLESSON 19 POWER UP C PAGE 128

Perimeter The distance around the outside

Find any missing sides

Add all the sides together

6 cm

5 cm

Perimeter of Regular Polygons Add all the sides or P = side length × number of sides 4 in

Perimeter Formulas Rectangle: or

Square:

W

LS

Perimeter of Irregular Polygons Find the length of the missing sides Add all sides together

3 cm

9 cm

8 cm

ab

5 cm

Perimeter of Irregular Polygons

8 cm

3 cm

9 cm 5 cm

4 cm

5 cm9 cm

8 cm

Find the Sides of a Regular Polygon Side length = perimeter ÷ number of sides

The perimeter of a pentagon is 45 yds. How long is each side?

The perimeter of a square is 36 ft. How long is each side?