This key facts covers Three Things to State within Transformations: Rotations for GCSE Mathematics. Revise Transformations: Rotations in Geometry & Measures for GCSE Mathematics with 12 exam-style questions and 5 flashcards. Use this page as part of a wider topic revision path rather than treating it as an isolated fact. It is section 2 of 7 in this topic. Use this key facts to connect the idea to the wider topic before moving on to questions and flashcards.
Three Things to State
| Information | Details | Example |
|---|---|---|
| Centre | Fixed point (coordinates) | Origin (0,0) or (2,3) |
| Angle | How far to turn | 90°, 180°, 270° |
| Direction | Clockwise (CW) or Anticlockwise (ACW) | 90° clockwise |
Practice questions for Transformations: Rotations
To fully describe a rotation, which three pieces of information are needed?
Shape A has vertices at (2, 1), (4, 1) and (4, 3). Shape B has vertices at (−1, 2), (−1, 4) and (−3, 4). Fully describe the single transformation that maps shape A onto shape B.
Quick recall flashcards
Describing Rotations
Must state THREE things: Centre (coordinates), Angle (90°/180°/270°), Direction (CW/ACW except for 180°).
180° Rotation
(x,y) → (-x,-y). Both coordinates change sign. Same clockwise or anticlockwise!