Dilate Line Segment

When you dilate you ___________ the distance by the scale factor

• Add

• Subtract

• Divide

• Multiply

Tags

CCSS.8.G.A.3

Dilating point A using center C and scale factor 2.5 gives image A'. Dilating point B using center C and scale factor 2.5 gives image B'. What statements are true?

• Segment A'B' is 2.5 times as long as line segment AB.

• Line A'B' is not parallel Line AB.

• Line A'B' is parallel to line AB.

• There is not enough information.

Answer explanation

distance x scale factor means A'B' is 2.5 times larger

Dilations of lines NOT including the center point are parallel.

Tags

CCSS.8.G.A.3

What is the scale factor?

• 2.5

• 2

Answer explanation

Tags

CCSS.7.G.A.1

line f is dilated with a scale factor of 2 to create g. Which point is the center of dilation?

• A

• B

• C

• D

Answer explanation

f is the pre-image. g is the image

Scale factor of 2 moves f father away from D.

A doesn't work because the scale factor would need to be 1/2

B or C don't work because the are ON the lines.

Tags

CCSS.8.G.A.3

Polygon Q (image) is a scaled copy of Polygon P (pre-image). The scale factor is 0.75. If x is 6, what is y?

• 4.5

• 48

Answer explanation

Tags

CCSS.7.G.A.1

Point B is dilated using Center A and a scale factor of 1/3. Which point is the IMAGE of B?

• A

• B

• C

• D

Tags

CCSS.8.G.A.3

When you dilate you MULTIPLY the distance by the _____ _____

Tags

CCSS.8.G.A.3

Determine the center of the dilation.

• Point A

• Point B

• Point C

• Point D

Tags

CCSS.8.G.A.3

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

• reduction

• enlargement

• scale

• not proportional

Tags

CCSS.8.G.A.3

Dilate Point B by a scale factor of 1/2

• (1.5,-4)

• (-1.5,1)

• (-1,-1.5)

• (-2,-2)

Tags

CCSS.8.G.A.3