Dilations Notes

The __________ is the ratio of a length of the new figure to the corresponding length on the original figure.

• reduction

• enlargement

• scale factor

• center of dilation

A dilation can produce a smaller figure also known as a ______

• reduction

• enlargement

• scale factor

• center of dilation

 A dilation can produce a larger figure also known as a ______

• reduction

• enlargement

• scale factor

• center of dilation

If a dilation produces a congruent figure, then the scale factor was equal to _____

• 1/2

• 2

• 10

• 1

If a figure has a side length that is 12 units long and is dilated such that the side length of the image is 24 units long, what is the scale factor?

• 1/2

• 12

• 2

• 6

A scale factor of 1/2 reduces a figure.

• True

• False

Dilate the figure by a scale factor of 3 with the origin as the center of dilation. What are the coordinates of the image?

• A'(9,9) B'(18,18) C'(27,9)

• A'(6,6) B'(9,9) C'(12,6)

• A'(0,0) B'(3,3) C'(6,0)

• A'(1,1) B'(2,2) C'(3,1)

A triangle has vertices with coordinates (2,0), (3, -1) and (-2,-5). If the triangle is dilated by a scale factor of 3 with the origin as the center of dilation, what are the coordinates of the vertices of the image?

• (5,3), (6,2), (1,-2)

• (6,0), (9,-3), (-6,-15)

• (2/3,0), (1,-1/3), (-2/3,-5/3)

• (-1,-3), (0,-4), (-5,-8)

A dilation is which of the following: 

• only an enlargement

• only a reduction

• Either an enlargement or a reduction

• Neither an enlargement or a reduction

A dilation can produce a larger figure or a(n)______
use a synonym for larger

• reduction

• enlargement

• scale factor

• center of dilation