Edexcel GCSE Mathematics · 1MA1
Specification G7 · Paper 1, Paper 2, Paper 3
A turn through a specified angle about a fixed centre.
Revise: TransformationsA translation, reflection or rotation produces a congruent image.
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GCSE Mathematics · key term
A transformation that turns a shape through a specified angle and direction about a fixed point.
Used by Edexcel and OCR
Specification G7 · Paper 1, Paper 2, Paper 3
A turn through a specified angle about a fixed centre.
Revise: TransformationsA translation, reflection or rotation produces a congruent image.
Specification 8.01g, 9.01b · Paper 1 (Foundation), Paper 2 (Foundation), Paper 3 (Foundation), Paper 4 (Higher), Paper 5 (Higher), Paper 6 (Higher)
Revise: Coordinate GeometryTranslations, reflections and rotations preserve lengths and angles, so their images are congruent to the original shape. An enlargement preserves angles and overall shape but changes lengths according to its scale factor.
A transformation that turns every point of a shape through the same angle, in the same sense, about one fixed point.
Describe a transformation fully: give the translation vector, the mirror line, the centre, angle and direction of rotation, or the centre and scale factor of enlargement, as appropriate.
A complete reflection description names the mirror line. A complete rotation description gives the angle, direction and centre. A complete enlargement description gives the scale factor and, when required, the centre.
Do not assume the centre of a rotation or enlargement is the origin unless the question states or shows this.
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