passpadi

2016

Mathematics

JAMB

Calculate the perimeter of a sector of a circle of raduis 9cm and angle 36o.

A.

18cm

B.

(18 + 9π/5)cm

C.

(9 + 9π/5)cm

D.

9π/5cm

Correct Answer: (18 + 9π/5)cm

Explanation

Perimeter = 2r + θ/360 x 2πr 2(9) + 36/360 x 2 x π x 9 = 18 + 9π/5

Perimeter = 2r + θ/360 x 2πr 2(9) + 36/360 x 2 x π x 9 = 18 + 9π/5
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