Key learning points

1. There are clues that can be looked for to determine if a shape has been transformed.
2. If the size has changed, one shape may be an enlargement of the other.
3. If the orientation has changed, one shape may be a rotation of the other.
4. If the shapes are mirrored, one shape may be a reflection of the other.
5. If the shapes look identical but are in different places, one may be a translation of the other.

Keywords

• Transformation - A transformation is a process that may change the size, orientation or position of a shape.

• Congruent - If one shape can fit exactly on top of another using rotation, reflection or translation, then the shapes are congruent.

• Invariant - A property of a shape is invariant if that property has not changed after the shape is transformed.

Common misconception