ECZ 2021 · GCE Paper 1 — Circle Theorems
In the diagram, A, B, C and D are points on the circumference of a circle, centre O, with angle DAB = 36°, BC = CD and EBF a tangent at B. Find angle BCD.
- A. 36°
- B. 72°
- C. 144°
- D. 108°
Verified working — step 1
ABCD is a cyclic quadrilateral, so opposite angles add to 180°. Angle DAB and angle BCD are opposite, so angle BCD = 180° − 36° = …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.
Have a different question?
Search it — if it is from a past paper or a school mock, chances are we have it worked out, or one that uses the same method.
Search any past-paper question