Unit 4 Geometry 2020-21

Choose the BEST answer

A dilation is which of the following:

• Scale factors higher than 1

• Scale factors higher than 0

• Non-rigid transformation for enlargements or reductions of figures

• Rigid transformations where figures are enlarged or shrunk

The __________ is the ratio of a length of the new figure to the corresponding length on the original figure.

• reduction
• enlargement
• scale factor
• center of dilation

Tags

CCSS.7.G.A.1

Similar figures have the same ______ but different ______. 

• measure; shapes
• sizes; shapes
• value; measures
• shape; sizes

Tags

CCSS.HSG.CO.B.6

CCSS.8.G.A.2

State the coordinate of the image of the given point B (4,9) under a dilation with center at the origin with the given scale factor of 2.

• B' (2 , 4.5)

• B' (-8 ,-18)

• B' (8 ,18)

• B' (9 ,4)

Tags

CCSS.8.G.A.3

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

• ½
• ¼
• 4
• 2

Tags

CCSS.8.G.A.3

What scale factor was used to produce the image?

• 2
• -2
• ¹/₂
• 1

Tags

CCSS.HSG.CO.A.2

Find the measure of x:

• 6
• 24
• 33
• 36

Tags

CCSS.HSG.SRT.A.2

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

• addition 
• subtraction 
• multiplication 
• division 

Tags

CCSS.8.G.A.3

The center of dilation is important because

• it's the location from which the dilation occurs.

• All of the corresponding points of the image and pre image are on the lines projected from the Center of Dilation.

• it's a fixed point on the plane about which all points are expanded or contracted.

• All of the above

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

• ½

• ¼

• 4

• 2

Tags

CCSS.8.G.A.3