**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 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).