WAEC Mathematics 2014 Objective — Question 8

Question 8 of 50 from the West African Examinations Council (WAEC) Mathematics 2014 Objective paper, with the correct answer and a full explanation.

In the diagram, the value of x°+y°=220°. Find the value of n°.

• A. 20°
• B. 40°Correct
• C. 60°
• D. 80°

Explanation

Since x°+y°=220° are the two base exterior-related angles, n° = x°+y°−180° = 220°−180° = 40°.

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