Dilations Centered at the Origin

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

What scale factor was used to produce the image?

• 2

• 3

• 1/3

• 1/2

What scale factor was used to produce the image?

• 1

• 7

• 18

• 49

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

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

• -2

• 0

• 1

• ¹/₂

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

• Yes, enlarge

• Yes, reduce

• No

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)

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

• G' (5,3)

• G' (20,12)

• G' (-20,-12)

• G' (-5,-3)