1. What are congruent figures?
Congruent figures have the same shape and size.
2. Which points do not change under a reflection?
Points on the mirror line are invariant (do not change) under a reflection.
3. What is an isometry ?
An isometry is any transformation in which the size and shape of an image stays the same as the object.
4. What is the connection between the mirror line and the line joining a point and its image?
They intersect (cross) at right angles.
5. What is an image point?
An image point is the result of carrying out a transformation such as a reflection, on a point (the object).