ECZ 2020 · O-Level Paper 1 — Circle Theorems
In the diagram, P, Q, R, S and T lie on a circle and TQ = TR. PR and TS are parallel. Angle TQR = 70° and angle TRP = 20°. Find (a) angle RTQ.
- A. 70°
- B. 55°
- C. 40°
- D. 20°
Verified working — step 1
Triangle TQR is isosceles (TQ = TR), so angle TQR = angle TRQ = 70°. Then angle RTQ = 180° - 70° - 70° = …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