Chapter 9: Transformations

1
Chapter 9 Transformations

• Review of 9.1-9.3

2
Review Translations

• What is the beginning figure called?
• What is the end result called?
• What is an isometry?

3
Example 1

• Translate ?LMN with L(-6,-1), M(-4,-3) and
  N(-1,-1) under the rule (x,y)?(x - 7,y - 1).

4
Example 2

• Write a rule to describe the translation

5
Review Reflections

• What does a reflection look like?

6
Example 3

• Reflect ?XYZ with X(0,1), Y(2,3), and Z(-3,4)
  over the x-axis.

7
Example 4

• Reflect a square with A(1,1), B(5,1), C(5,5), and
  D(1,5) over the line y x.

8
Review Rotations

• What three things does a rotation have?
• Remember two ways
• by construction (no coordinates)
• by coordinates (I gave you the rules)

9
Example 5

• Rotate the figure 90 clockwise around the origin.

10
Example 6

• Rotate the figure 90 counterclockwise, then 180
  clockwise around the origin.