ECZ 2012 · O-Level Paper 1 — Circle Theorems
In the diagram, AT and TB are tangents to the circle at A and B, angle CAO = 30° and angle CBO = 29°. Calculate angle ATB.
- A. 118°
- B. 59°
- C. 121°
- D. 62°
Verified working — step 1
Work in the quadrilateral OATB - it carries two tangent-radius right angles and the centre angle.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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