JAMB Mathematics 2017 Objective — Question 9

Question 9 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, MNRS is a cyclic quadrilateral with angle 100° marked; find the value of x.

A. A. 90°
B. B. 110°
C. C. 100°
D. D. 80°Correct

Explanation

Opposite angles of a cyclic quadrilateral are supplementary; x = 180° - 100° = 80°.

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