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 Form 2 Mathematics online lessons on rotation

Rotational symmetry of plane figures

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Answer Text:
The number of times the figure fits onto itself in one complete turn is called the order of rotational symmetry.
Note; The order of rotational symmetry of a figure = 360 angle between two identical parts of the figure.
Rotational symmetry is also called point symmetry.
Rotation preserves length, angles and area, and the object and its image are directly congruent.