WAEC Mathematics 2017 Objective — Question 35
Question 35 of 50 from the West African Examinations Council (WAEC) Mathematics 2017 Objective paper, with the correct answer and a full explanation.
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Three exterior angles of a polygon are 30°, 40° and 60°. If the remaining exterior angles are 46° each, name the polygon.
- A. A. Decagon
- B. B. Nonagon
- C. C. OctagonCorrect
- D. D. Hexagon
Explanation
Sum of exterior angles = 360°. 30+40+60+46n=360 → 130+46n=360 → 46n=230 → n=5. Total sides = 3+5=8, so the polygon is an octagon.
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