Dilations and Scale Factor Review

Triangle EFG is dilated with a scale factor of 1/2. The measure of <F is 36 degrees. What is m<F' ?

• 18

• 36

• 72

What is the name of the point from which a dilation is drawn?

• the vertex

• the center of dilation

• the origin of dilation

• the corner

A triangle is dilated with a center of dilation at the origin. Point P is on the figure and P' is the corresponding point on the image of the dilation. Point P is at (-2,3) and P' is at (-8,12). What is the scale factor?

• 2

• 4

• 6

• 9

Triangle ABC is dilated to produce A'B'C' with a scale factor of 3/4. Which describes the relationship between the two triangles?

• A'B'C' is an enlargement

• A'B'C' is a reduction

• A'B'C' is congruent to ABC

• A'B'C' is a mirror image of ABC

A triangle has vertices at (1,1), (1,2), and (3,2). It is dilated by a scale factor of 3 with the origin as the center of dilation. What are the coordinates of the image?

• (4,1) (4,2) (6,2)

• (1,4) (1,5) (3,5)

• (3,3) (3,6) (9,6)

Given the triangles are similar. Which is the length of UV?

• 3.6 inches

• 2.4 inches

• 8.1 inches

• 4 inches

Which of the following are true about dilations? Select all that apply.

• Dilations have the same shape as the original.

• Dilations can be enlargements of the original image.

• Dilations can be reductions of the original image.

• Dilations are always congruent.

What is the scale factor?

• 2

• 1/2

• (1,2)

• (2,1)

What Transformation is visible?

• Reflection

• Translation

• Rotation

• Dilation

What is the center of dilation?

• (0,0)

• R

• C

• D