JAMB Mathematics 2017 Objective — Question 37

Question 37 of 40 from the Joint Admissions and Matriculation Board (JAMB) Mathematics 2017 Objective paper, with the correct answer and a full explanation.

From the diagram, a triangle is inscribed with a circle; find the value of x.

A. A. 15°Correct
B. B. 45°
C. C. 25°
D. D. 30°

Explanation

The exterior angle of the triangle equals the sum of the two opposite interior angles: 65° = x° + 50°, so x = 15°.

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