WAEC Mathematics 2022 Question 21

Question 21

Mensuration of Plane Shapes

In the diagram, ∠POQ = 150° and the radius of the circle PSQR is 4.2cm. [Take π = 22/7] Find the length of the minor arc PRQ.

Diagram for this question
  1. A.11.00cm
  2. B.15.40cm
  3. C.17.64cm
  4. D.23.10cm
Show the answer and explanation

Answer: A (11.00cm)

Explanation

Arc = (150/360) × 2 × (22/7) × 4.2 = 11.00 cm.