ECZ 2010 · O-Level Paper 1 — Symmetry
Describe fully the rotational symmetry of a 72-sided regular polygon with centre K.
- A. Order 36, angle 10° about K
- B. Order 72, angle 5° about K
- C. Order 72, angle 72° about K
- D. Order 5, angle 72° about K
Verified working — step 1
A regular polygon with n sides has rotational symmetry of order n about its centre, and the angle of rotation is 360n. Here order 72 and 36072= …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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