ECZ 2012 · O-Level Paper 1 — Circle Theorems
In the diagram, A, B and C are points on the circumference of a circle with centre O. AT and TB are tangents to the circle, angle CAO = 30° and angle CBO = 29°. Calculate angle ACB.
- A. 30°
- B. 29°
- C. 59°
- D. 118°
Verified working — step 1
OC splits angle ACB into two parts - and the radii make each part equal to a given base 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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