This study notes covers Worked Example: 90° Rotation 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 5 of 7 in this topic. Use this study notes to connect the idea to the wider topic before moving on to questions and flashcards.
Worked Example: 90° Rotation
Rotate point (4, 2) by 90° clockwise about the origin.
Step 1 Use the formula
90° CW about origin: (x, y) → (y, -x)
Step 2 Apply to point
(4, 2) → (2, -4)
Step 3 Write answer
Image: (2, -4)
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.