Order of rotational symmetry

Definition

The number of positions in one complete turn at which a shape matches itself, including the position reached at $360^\circ$ .

Used by AQA and OCR

Specification G1 · Paper 1, Paper 2, Paper 3

Specification 8.04c · Paper 1 (Foundation), Paper 2 (Foundation), Paper 3 (Foundation), Paper 4 (Higher), Paper 5 (Higher), Paper 6 (Higher)

The number of positions in one complete turn in which a shape looks exactly the same, including its starting position.
The order of rotational symmetry counts every matching position during one complete turn, including the position reached at 360°. This means every shape has an order of at least 1. Order 1 means that the shape matches only after a complete turn.

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