Dilations

1. 6.7 Dilation
November 21, 2013
13.5
12
23.8
Bellwork
Nov 30­1:31 PM
HW pg. 412 #3­21 odds
1

2. 6.7 Dilation
November 21, 2013
6.7 Similarity Transformations
Dilation: stretches or shrinks
Center of Dilation: fixed point
Scale Factor: ratio of a side length to corresponding side length of original
Coordinate Notation for a Dilation: (x,y) ‐> (kx, ky)
Reduction: 0 < k < 1
Enlargement: k > 1
Nov 30­2:06 PM
HW pg. 412 #3­21 odds
2

3. 6.7 Dilation
November 21, 2013
Dec 7­8:07 AM
HW pg. 412 #3­21 odds
3

4. 6.7 Dilation
November 21, 2013
Dec 7­9:08 AM
HW pg. 412 #3­21 odds
4

5. 6.7 Dilation
November 21, 2013
Reading Diagrams
A point of the figure and its image lie on the same ray from the
origin for a center of dilation at the origin.
Dec 7­8:08 AM
HW pg. 412 #3­21 odds
5

6. 6.7 Dilation
November 21, 2013
HW pg. 412 #3‐21 odds
Dec 7­9:10 AM
HW pg. 412 #3­21 odds
6