Unit 4 Review

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

• an enlargement
• a reduction
• a scale factor
• bigger

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

• a reduction
• an enlargement
• a scale
• not proportional

What is the scale factor from ΔDEF to ΔABC?

• 2

• 3/2

• 2/3

• 1/2

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

• addition 
• subtraction 
• multiplication 
• division 

Find the scale factor of the dilation. Then tell whether the dilation is a reduction or an enlargement.

• 2 / 5; reduction

• 5 / 2; enlargement

• 2 / 3; reduction

• 3 / 2; enlargement

Find side length X.

• 16
• 18
• 2.4
• 15

The point (8, 12) was dilated to become point (2, 3). What was the scale factor?

• ½
• ¼
• 4
• 2

What is the scale factor?

A (2, 10)

A' (3, 15)

• 2

• 3

• 2/3

• 3/2

What is the scale factor?

A (6, 12)

A' (4, 8)

• 2

• 3

• 2/3

• 3/2

If k=-1 (k is scale factor), then a dilation will result in a______

• similarity reflection
• congruent figure
• reduction
• translation