passwella.
Menu

JAMB Mathematics 1985 Question 49

Question 49

Triangles and Quadrilaterals

In the figure above find angle x

Diagram for this question
  1. A.100°
  2. B.120°
  3. C.60°
  4. D.110°
  5. E.140°.
Show the answer and explanation

Answer: E (140°.)

Explanation

In this arrowhead shape the angle x at the inner corner equals the sum of the other three angles: 20° + 80° + 40° = 140°.