Dilations in the Coordinate Plane

A dilation is which of the following: 

• An enlargement

• A reduction

• Either an enlargement or a reduction

• Neither an enlargement or a reduction

In a dilation what mathematical operation is used with the scale factor?

• addition 

• subtraction 

• multiplication 

• division 

If the scale factor is less than one, the new figure will be

• an enlargement

• a reduction

• a scale factor

• bigger

When a dilation has a scale factor greater than one, the dilation is an enlargement.

• True

• False

What is the scale factor if the triangle on the left is the original?

• 2

• 3/2

• 2/3

• 1/2

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

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)

Dilations only enlarge figures.

• True

• False

A scale factor of 1/2 reduces a figure.

• True

• False

A dilation creates a similar figure.

• True

• False