ECZ 2016 · GCE Paper 1 — Circle Theorems
In the diagram below, TR is diameter of the circle with centre O, and QR and PS are parallel. Angle TÔS = 80° and angle TR̂P = 10°. Find RP̂S.
- A. 40°
- B. 100°
- C. 25°
- D. 50°
Verified working — step 1
Work in ARCS: the centre angle fixes arc TS, the diameter fixes the semicircle, and an inscribed angle is half its own arc.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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