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

Mathematics
JAMB 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 Answer: Option B
Explanation

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

There is an explanation video available below.


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Explanation Video

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