9-5 Quiz: Dilations

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

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

• addition 
• subtraction 
• multiplication 
• division 

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

What scale factor was used to produce the image?

• 2
• -2
• ¹/₂
• 1

Choose the correct scale factor:

• 2
• 3
• 1/3
• 1/2

Enlargement or reduction?  Find the scale factor!

• It's an enlargement; the scale factor is 1/2.
• It's an enlargement; the scale factor is 2.
• It's a reduction; the scale factor is 1/2.
• It's a reduction; the scale factor is 2.

When the scale factor of a dilation is less than one, the dilation is a reduction.

• True
• False

Triangle ABC will be dilated by a scale factor of 1/2. What will be the coordinates of C'?

• (-1, -2.5)

• (12, 6)

• (3, -1.5)

Dilate Point B by a scale factor of 3:

• (12,0)
• (12,12)
• (4,3)
• (0,12)

Enlargement or reduction? Find the scale factor!

• It's an enlargement; the scale factor is 3.

• It's a reduction; the scale factor is 1/3.