1. Transformations and Tesselations
By: Christine Berg
Edited By: VTHamilton

2. Movements of a figure in a plane May be a SLIDE, FLIP, or TURN
Transformation
Movements of a figure in a plane
May be a SLIDE, FLIP, or TURN

3. Another name for a SLIDE
Translation
Another name for a SLIDE A A’ C B C’ B’
A’, B’ and C’ are explained in the next slide...

4. The figure you get after a translation
Image
The figure you get after a translation A A’
Slide C B C’ B’
Original
Image
The symbol ‘ is read “prime”.
ABC has been moved to A’B’C’.
A’B’C’ is the image of ABC.

5. Finding the amount of movement LEFT and RIGHT and UP and DOWN
Writing a Rule
Finding the amount of movement LEFT and RIGHT and UP and DOWN

6. Writing a Rule Right 4 (positive change in x) Down 3 (negative9 8 7 6 5 4 3 2 1
Right 4 (positive change in x) B
Down 3
(negative
change in y) B’ A C A’ C’

7. Can be written as: R4, D3 (Right 4, Down 3) (x+4, y-3)
Writing a Rule
Can be written as:
R4, D3
(Right 4, Down 3)
(x+4, y-3)

8. Reflection
Another name for a FLIP A A’ C B B’ C’

9. Used to create SYMMETRY on the coordinate plane
Reflection
Used to create SYMMETRY on the coordinate plane

10. When one side of a figure is a MIRROR IMAGE of the other
Symmetry
When one side of a figure is a MIRROR IMAGE of the other

11. The line you reflect a figure across
Line of Reflection
The line you reflect a figure across
Ex: X or Y axis

12. Rotation
Another name for a TURN C’ B’ B A’ C A

13. A transformation that turns about a fixed point
Rotation
A transformation that turns about a fixed point

14. Center of Rotation
The fixed point C’ B’ B A’ C A
(0,0)

15. Rotational Symmetry
When an image after rotation of 180 degrees or less fits exactly on the original

16. Measuring the degrees of rotation
Rotating a Figure
Measuring the degrees of rotation C’ B’ B A’
90 degrees C A