Question on: JAMB Mathematics - 2016
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
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Correct Option: B
Perimeter = 2r + \(\frac{0}{360}\) x 2\(\pi\)r
= 2(12) + \(\frac{60}{360}\) x 2 x \(\pi\) x 12
= (24 + 4\(\pi\))cm
= 2(12) + \(\frac{60}{360}\) x 2 x \(\pi\) x 12
= (24 + 4\(\pi\))cm
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