1. 11.4 Translations and Reflections
Objective: Students will be able to demonstrate how to translate and reflect coordinates. They will also be able to explain what effect it has on size/shape/area.
11.4 Translations and Reflections

2. Definitions Transformation: maps original figure onto new figure.
Image: new figure.
Types
Translation
Reflection
Rotation
dilation

3. Translations Translation: slide a figure. Translation Info
Called a slide
Same shape and size
Orientation is the same.
Area/Perimeter not affected

4. Translate down 2 and right three.
Translate 3 up and 2 left.

5. Translations - st Translate up 2, right 3, down 4
Translate down 3 and left 6

6. Reflections Reflection: flip a figure over a line.
Line of symmetry: line figure flipped over.
Usually x or y axis
Reflection info
Called a flip
Figures mirror image
Same shape/size
Orientation different
Area/Perimeter not affected

7. Reflection - t Reflect over x-axis
Reflect over y-axis and then x-axis.

8. Reflection - st Reflect over the y-axis
Reflect over y axis and then x axis.

9. Reflection or Translation

10. Wrap-up Questions/Comments Hw: activity
Objective: Students will be able to demonstrate how to translate and reflect coordinates. They will also be able to explain what effect it has on size/shape/area.

11. Activity
1. On your coordinate plane, plot the following points and connect them in order ending with D to A(make sure you label with the letter):
A(-9,8), B(-2,8), C(-5,5), D(-5,2).
Then from those points reflect over the y-axis.
Then reflect over x-axis.
Finally translate it 5 to the left and 3 down.