1. 9.2 Reflections
By Brit Caswell

2. What is a reflection?
A reflection is a transformation with the following properties:
If a point is on the line of reflection, the point remains the same in the reflection
If a point is not on the line of reflection, then the line of reflection is the perpendicular bisector of the segment between the two.

3. What does that even mean?
Point A and Point A’
are the same!
Point B and Point B’ are the
same distance from line m.

5. Properties of Reflections
Reflections preserve distance
Reflections preserve angle measure
Reflections map each point of the preimage to one and only one corresponding point of its image.

6. Reflect this parallelogram across
the line of reflection
Are the sides of the
parallelogram still parallel?