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WAEC Mathematics 2004 Question 7

Question 7

Triangles and Quadrilaterals

Find the value of x in the diagram

Diagram for this question
  1. A.10°
  2. B.28°
  3. C.36°
  4. D.44°
Show the answer and explanation

Answer: B (28°)

Explanation

Angles at a point add to 360°: (x + 10) + (4x + 50) + 20 + 3x + 2x = 10x + 80 = 360, so x = 28°.