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WAEC Mathematics 2003 Question 21

Question 21

Triangles and Quadrilaterals

What is the size of angle x in the diagram?

Diagram for this question
  1. A.15°
  2. B.30°
  3. C.45°
  4. D.60°
Show the answer and explanation

Answer: B (30°)

Explanation

The 5 cm side is opposite x and the hypotenuse is 10 cm: sin x = 5/10 = 0.5, so x = 30°.