Dilations

A dilation is which of the following: 

• only an enlargement

• only a reduction

• either an enlargement or a reduction

• neither an enlargement nor a reduction

Does the image show a Dilation? If yes, did the image enlarge, reduce or none of the above?

• Yes, enlarge

• Yes, reduce

• No

What scale factor was used to produce the image?

• 2

• -2

• ¹/₂

• 1

What scale factor was used to produce the image?

• 2.5

• 1.5

• 3.5

• 4

State the coordinate of the image of the given point B (-10,-6) under a dilation with center at the origin with the given scale factor k = 1/2.

• (5,3)

• (20,12)

• (-20,-12)

• (-5,-3)

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 r = 2.

• (2,4.5)

• (-8,-18)

• (8,18)

• (9,4)

The red triangle has been dilated by a scale factor of 1/4 about the origin, which triangle is it's new image? 

• green triangle 

• red triangle 

• black triangle

• none of these 

Under a dilation, which scale factor will result in a congruent image?

• -2

• 0

• 1

• ¹/₂

A dilation always produces a similar figure. Similar figures have the same ______ but different ______. 

• measure; shapes

• sizes; shapes

• value; measures

• shape; sizes

Did the image enlarge, reduce or none of the above?

• Enlarge

• Reduce

• None of the above