Dilations and Angles

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

• If the center of dilation is the origin, the scale factor is multiplied to the coordinates of the pre-image to determine the image coordinates.

• If the center of dilation is a point other than the origin, the scale factor is multiplied to the slope between the center and the coordinates of each pre-image point to determine the slope between the center and each image point.

• The center of dilation will always be stated in a dilation problem.

• When the center of dilation is the origin, you compare ordered pairs to find the scale factor.

• When the center of dilation is NOT the origin, you compare ordered pairs to find the scale factor.

Tags

CCSS.8.G.A.3

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

• ½

• ¼

• 4

• 2

Tags

CCSS.8.G.A.3

If point A (2, 1) is dilated by a scale factor of 2 with a center of dilation at (0, 2), what are the coordinates of A' ?

hint: you will need to use your graph paper!

• (4, 2)

• (4, 0)

• (-2, 3)

• (-4, 4)

Tags

CCSS.8.G.A.3

Which of the following is NOT one of the angle measures?

• 95

• 40

• 85

• 45

Tags

CCSS.8.G.A.5

Find the scale factor from PQRS to DEFG.

• 4:1

• 1:4

• 2:1

• 1:2

Tags

CCSS.7.G.A.1

Select each of the answers for x, y, and z. You should select 3 answers.

• 9

• 14

• 18

• 28

• 122

Tags

CCSS.HSG.SRT.A.2

If point A (-3, 2) is dilated by a scale factor of ⅔ with a center of dilation at (3, -1), what are the coordinates of A' ?

hint: you will need to use your graph paper

• (1, 1)

• (1, -1)

• (0, 0)

• (-1, 1)

Tags

CCSS.8.G.A.3

Choose a correct equation to find x.

• 4x - 2 + 12x + 1 = 75

• 4x - 2 + 75 = 12x + 1

• 4x - 2 + 75 + 12x + 1 = 180

• 4x - 2 - 75

Tags

CCSS.8.G.A.5