RULES/FACTS
Which property is not preserved under a dilation?
Distance
Find the scale factor
Preimage:(2,2) and Image: (5,5)
2.5
Preimage(7,2) scale factor:10
(70,20)
What is it called when you add up all the sides of a shape?
Perimeter
When the scale factor is greater than one, what will the image look like?
enlarged
What do you need in order to dilate (2)?
1. Scale factor
2. Center
Image(56,64)
scale factor=8
Preimage (3,8) scale factor:5
(15,40)
What is it called when you multiply the sides of a shape?
Area
When the scale factor is smaller than one what will the image look like?
shrinked
How do you find the scale factor when centered at the origin?
NEW/OLD
preimage (6,3)
image(2,1)
1/2
Preimage (27,37) scale factor:2
(54,74)
What is it called when you multiply each side to get the corresponding figure just dilated
scale factor
What if the scale factor is equal to one what will the image look like?
the same as the preimage
A transformation that changes the size but not the shape of a figure
Preimage (46,37)
image(23,18.5)
1/2
Preimage(28,83)scale factor:5
(140,415)
What would the perimeter be if a rectangle is 6 by 2?
16
Are dilations rigid motions?
no, they are NON RIGID MOTIONS!!
What is a scale factor?
it describes how much larger or smaller the image of a dilation is than the pre image
Pre image (5,10)
image (20,40)
4
(7548,578)
Two figures are similar if they have the same shape, but not the same________.
size
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