the pizza has 360 degree full angle
one slice out of equal 9 slices = 1/9
Central angle of one slice is = 1/9 (360 degrees) = 40 degrees
radius (length of side of a slice of pizza) = 9 cm
arc length of one slice of pizza:
arc length = 2πr (central angle)
360 degrees
arc length = 2 (3.14) (9 cm) (40 degrees/360 degrees)
arc length = 6.28 (9 cm) (1/9)
arc length = 6.28 cm
Perimeter of one slice of pizza:
P = 9 cm + 9 cm + 6.28 cm
P = 24.28 cm