**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 lineare invariant (do not change) under a reflection.

**3. What is the connection between the mirror line and the line joining a point and its image?**

They intersect (cross) at right angles.

**4. What is an image?**

An image is the result of carrying out a transformation such as a reflection on an object.