WAEC Mathematics 2016 Objective — Question 46
Question 46 of 50 from the West African Examinations Council (WAEC) Mathematics 2016 Objective paper, with the correct answer and a full explanation.
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46. The ratio of the exterior angle to the interior angle of a regular polygon is 1:11. How many sides has the polygon? A. 30 B. 24 C. 18 D. 12
- A. 30
- B. 24Correct
- C. 18
- D. 12
Explanation
Exterior:Interior=1:11 → (360/n):((n-2)180/n)=1:11 → 22/(n-2)=1 → n=22+2=24.
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