Terms, Definitions, T/F, Fill in the Blank
A transformation that changes the size but not the shape of a geometric figure
Dilation
Preimage: (2, 2) Image: (5, 5)
2.5
Preimage: (7, 2) Scale factor: 10
(70, 20)
Scale Factor: 0.1
(0.1x,0.1y)
Preimage:(1,2) Image:(2,4)
Enlargment
True or false: Dilations are congruent.
False
Preimage: (7, 8) Image: (56, 64)
8
Preimage: (3, 8) Scale factor: 5
(15, 40)
Scale Factor: 1/2
(1/2x,1/2y)
Preimage:(3,6) Image:(1,2)
Reduction
Describes how much larger or smaller the image of a dilation is than the pre image
Scale Factor
Preimage: (6, 3) Image: (2, 1)
1/2
Preimage: (27, 37) Scale factor: 2
(54, 74)
Preimage: (42, 49) Image: (6, 7)
(1/7x,1/7y)
Scale Factor: 24
Enlargment
True or false: To find the scale factor, we use multiplication.
False
Preimage: (46, 37) Image: (23, 18.5)
1/2
Preimage: (28, 83) Scale factor: 5
(140, 415)
Preimage: (1, 7) Image: (48, 336)
(48x,48y)
Preimage:(3,3) Image:(2,2)
Reduction
A dilation is a ________ that changes the ________ but not the shape of a geometric figure.
transformation, size
Preimage: (53.7, 35.8) Image: (161.1, 107.4)
3
Preimage: (222, 17) Scale factor: 34
(7548, 578)
Preimage: (7, 8) Image: (56, 64)
(8x,8y)
Preimage:(-2,-1) Image:(-4,-2)
Enlargement