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Calculate the perimeter of a sector of a circle of raduis...

Calculate the perimeter of a sector of a circle of raduis 12cm and angle 60o.

A.

(12 + 4 $\pi$ )cm

B.

(24 + 4 $\pi$ )cm

C.

(12 + 6 $\pi$ )cm

D.

(24 + 6 $\pi$ )cm

View answer & explanation

Correct answer is B

Perimeter = 2r + $\frac{\theta}{360}$ x 2 $\pi$ r
= 2(12) + $\frac{60}{360}$ x 2 x $\pi$ x 12
= (24 + 4 $\pi$ )cm

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