Unit 2 Review- Dilations and Similar Figures

Check all of the proportions that are true.

• 
• 
• 
• 
• 

Check all of the proportions that are true.

• 
• 
• 
• 
• 

a. A dilation occurs when the side lengths of a figure are by a scale factor to create a similar figure.

a. If the scale factor is less than 1, the dilation is a(n) , meaning the new figure is smaller than the original figure.

If the scale factor is greater than 1, the dilation is a(n) , meaning the new figure is larger than the original figure.

a. If the scale factor is 1, the original figure and the new figure are .

Determine if the following dilations will result in an REDUCTION

• A

• B

• C

• D

• E

Check the algebraic representations that show a dilation has occurred.

• 
• 
• 
• 
• 

Square WXYZ is graphed on a coordinate grid with vertices at W(-5, 3), X(5, 3), Y(5, -3 ), and Z(-5, -3). Square WXYZ is dilated by a scale factor of p with the origin as the center of dilation to create square W’X’Y’Z’. Which ordered pair represents the coordinates of the vertex Y’ ?

• (5 + p, -3 + p)

• (5 - p, -3 - p)

• (5p, -3p)

• ( 5/p,-3/p )

What scale factor was used to produce the image?

• 2
• 3
• 1/3
• 1/2