1. Warm up Rotate P(-4, -4) 180 Rotate Q(-1, -3) 90 CCW
If a function is odd and one point on it is R(-3, 4). Name another point.
If a function is odd and one point on it is S(9, -10). Name another point.

2. Review Homework

3. Skills Check
You can do this!

4. Glide Reflections and Compositions

5. Compositions
When two or more transformations are combined to produce a single transformation
The composition of 2 (or more) isometries is an isometry.

6. Glide Reflections Combining, a translation with a reflection
If the line of reflection is parallel to the direction of translation, then it does not matter which you do first. Otherwise, order is important.

7. 1. Finding the Image of a Glide Reflection
Use the information below to sketch the image of QRS
after a glide reflection. Q(2, –3), R(4, –4), and S(5, –1)
Q’’(-2, 2), R’’(-4, 1), & S’’(-5, 4)

8. 2. Finding the Image of a Composition
Perform the following composition on
C(2, 0), D(3, 3)
C’(2, 0), D’(3, –3)
C’’(0, –2), D’’(–3, –3)

9. 3. Finding the Image of a Composition
Perform the Glide Reflection on A(–3, 5).
A’(–6, 2)
A’’(2, –6)

10. 4. Describing the composition
Rotation of 180° around the origin
Reflection across y = 1

11. Combinations of Transformations Practice WS #9
Class Work
Combinations of Transformations Practice WS #9
and
Symmetry on the Brain #10

12. Home Work
Mirror Mapping #11