Dilations Centered About the Coordinate Plane

Dilations produce similar figures. Similar figures have the same _____ and proportional _____.

• measures; shapes

• sizes; shapes

• angles; side lengths

• side lengths; angles

Which of the following are Dilations?

• (x, y) → (x, 3y)

• (x, y) → (3x, 3y)

• (x, y) → (x, y - 3)

• (x, y) → (.5x, .4y)

Does the image show a dilation?

• Yes

• No

What is the scale factor used to dilate the small square to the larger square given there areas?

• 4

• 16

• 3

• 12

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

• ½

• ¼

• 4

• 2

Dilations are ________ but not congruent.

• Similar

• Flipped

• Rotated

• Congruent

Dilations will always keep the same ________

• Orientation

• Size

• Area

• Perimeter

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