Transformations · Year 5
In Year 5 you learn: reflections and translations.
A transformation moves a shape. Reflections, rotations and translations keep the size and shape the same (the image is congruent); an enlargement changes the size by a scale factor but keeps the shape (the image is similar).
Key facts
- Reflection: in a mirror line; in the x-axis (x, y) → (x, −y); in the y-axis (x, y) → (−x, y).
- Translation: a column vector (a, b) means a right and b up.