Key learning points

1. If two shapes are congruent, then they are similar.
2. Congruent shapes have a scalar of one.
3. A ratio table can be a helpful tool for checking the multipliers.
4. The multiplicative relationship between the sides of the object is preserved in its image.

Keywords

• Similar - Two shapes are similar if the only difference between them is their size. Their side lengths are in the same proportions.

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

Common misconception