Key learning points

1. Two shapes are not congruent if there is a pair of lengths with a scalar not equal to one.
2. Congruent does not mean the orientation must be the same.
3. The angle sizes do not change.

Keywords

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

• Co-interior angles - Co-interior angles are on the same side of the transversal line and in between the two other lines.

Common misconception