Dilations

A dilation produces a similar figure

• True

• False

When the scale factor of a dilation is less than one, the dilation is a reduction (gets smaller).

• True

• False

An image is dilated at a scale factor of 1.5. This means the dilation is an enlargement and the dilated image will be bigger.

• True

• False

Choose the correct scale factor:

• 2
• 3
• 1/3
• 1/2

Dilate Point B by a scale factor of 3:

• (12,0)
• (12,12)
• (4,3)
• (0,12)

A dilation is which of the following:

• an enlargement

• a reduction

• Either an enlargement or a reduction

• Neither an enlargement or a reduction

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(3,3) B(6,6) C(9,3)

• 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)

If a line segment has a length of 12 units and after a dilation the image length is 4 units, what was the scale factor?

• 3
• 1/3
• 8

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

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

• addition 
• subtraction 
• multiplication 
• division