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a circular pizza of radius 9cm is cut into 9 equal slices.What is the perimeter of one slice?

Sagot :

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