JAMB Mathematics 2014 Question 27

Question 27

Triangles and Quadrilaterals

From the figure above, what is the value of p?

Diagram for this question
  1. A.45°
  2. B.135°
  3. C.90°
  4. D.60°
Show the answer and explanation

Answer: C (90°)

Explanation

q° and 30° are vertically opposite, so q = 30. (p + 2q)° and 30° lie on a straight line, so p + 60 + 30 = 180, giving p = 90°.