Dilations Notes

When you dilate, you ______ x and y by a number.

• Multiply

• Add

• Subtract

• Divide

Does the image show a dilation?

• Yes

• No

If k=1.25 (k is scale factor), then a dilation will result in a(n)______

• reduction

• enlargement

• scale factor

• center of dilation

Find the measure of x:

• 6

• 24

• 33

• 36

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

• reduction

• enlargement

• scale factor

• center of dilation

If a rectangle is drawn and another rectangle is drawn so that the sides are twice as big as the first rectangle, what happens to the area?

• doubles

• triples

• quadruples

• not enough information

If a line segment has a length of 12 units and after a dilation the image length is 4 units, what was the scale factor?

• 3

• 1/3

• 8

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

• addition 

• subtraction 

• multiplication 

• division 

The ________ is an unmovable (fixed) point that a dilation expands from or shrinks towards.

• Center of Dilation

• Scale Factor

• Center of Rotation

• Line of Reflection

A dilation creates a similar figure.

• True

• False