Mathematics for IGCSE & O level - Symmetry (Section 1 - No. 24)
Which is true for a figure with rotational symmetry of order 2?
It coincides with itself twice during a full rotation.
It has two lines of symmetry
It has a line of symmetry.
It coincides with itself in one position only.
Обяснение
A figure with rotational symmetry of order 2 fits onto itself twice in one full turn.