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WAEC Mathematics 2022 Question 19

Question 19

Triangles and Quadrilaterals

In the diagram, |XY| = |YZ| and ∠XYZ = 130°. Find the value of y.

Diagram for this question
  1. A.50°
  2. B.65°
  3. C.25°
  4. D.155°
Show the answer and explanation

Answer: D (155°)

Explanation

The base angles are (180° − 130°)/2 = 25°. y is on the straight line at Z: 180° − 25° = 155°.