ECZ 2024 · O-Level Paper 1 — Mensuration

The diagram shows a sector AOB whose area is 231cm² and radius 14cm. The angle subtended at the centre is θ. Find the value of θ. [π = 227]

Verified working — step 1

Area of sector = (θ/360°) × πr²

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Original examination question © Examinations Council of Zambia. Worked solution and commentary © G12 Titan — not to be reproduced without permission.

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