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WAEC Mathematics 2012 Question 16

Question 16

Mensuration of Plane Shapes

The lengths of the minor and major arcs of a circle are 54 cm and 126 cm respectively. Calculate the angle of the major sector.

  1. A.306°
  2. B.252°
  3. C.246°
  4. D.234°
Show the answer and explanation

Answer: B (252°)

Explanation

Circumference = 180 cm. Major angle = 126/180 × 360° = 252°.