WAEC Mathematics 2015 Objective — Question 14
Question 14 of 50 from the West African Examinations Council (WAEC) Mathematics 2015 Objective paper, with the correct answer and a full explanation.
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A sector of a circle with radius 6cm subtends an angle of 60° at the centre. Calculate its perimeter in terms of π.
- A. 2(π+6)cmCorrect
- B. 2(π+3)cm
- C. 2(π+2)cm
- D. (π+12)cm
Explanation
Perimeter = arc length + 2r = (θ/360)×2πr + 2r = (60/360)×2π(6) + 12 = 2π+12 = 2(π+6) cm.
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