ECZ 2014 · O-Level Paper 1 — Circle Theorems
In the diagram, O is the centre of the circle ABCD. AC is a diameter, AD and BC are produced to meet at E, angle CED = 27° and angle ACB = 43°. Find angle ADB.
- A. 43°
- B. 47°
- C. 27°
- D. 86°
Verified working — step 1
Angle ADB and angle ACB are subtended by the same chord AB at the circumference, on the same side of AB, so angle ADB = angle ACB = …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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