What is an invariant point?
In Transformations, invariant points are points that do not move when you complete a transformations.
When do invariant points occur?
This depends on the transformations.
1) Reflection: Invariant points occur if the mirror line touches the shape.
2) Rotation: Invariant points occur when the centre of rotation is on one of the edges or vertices of the shape to be rotated.
3) Enlargement: Invariant points occur when the centre of enlargement is on one of the edges or vertices of the shape to be rotated.
4) Translations: Invariant points cannot occur on a translation as every point moves the same amount.