ECZ 2014 · O-Level Paper 1 — Mensuration
The diagram shows a sector AOB in which OA = 4 cm and angle AOB = 45°. Find the area of the sector. Take π to be 3.14.
- A. 12.56 cm²
- B. 6.28 cm²
- C. 1.57 cm²
- D. 3.14 cm²
Verified working — step 1
Area = (45360) × πr² = (18) × 3.14 × 4² = (18) × 50.24 = …The full step-by-step working and final answer are included with Premium — checked against ECZ marking standards.
Original examination question © Examinations Council of Zambia. Worked solution and commentary © G12 Titan — not to be reproduced without permission.
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