Dilations Recap

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

• 4

• 16

• 3

• 12

A dilation can produce a smaller figure or a(n)______

• reduction

• enlargement

• scale factor

• center of dilation

Does the image show a dilation?

• Yes

• No

A triangle has vertices with coordinates (2,0), (3, -1) and (-2,-5). If the triangle is dilated by a scale factor of 3 with the origin as the center of dilation, what are the coordinates of the vertices of the image?

• (5,3), (6,2), (1,-2)

• (6,0), (9,-3), (-6,-15)

• (2/3,0), (1,-1/3), (-2/3,-5/3)

• (-1,-3), (0,-4), (-5,-8)

True of False: When you shrink a figure, you multiply by a fraction. 

• true

• false

True of False: When you expand a figure, you multiply by a whole number. 

• true

• false

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

• ½

• ¼

• 4

• 2

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

Dilations are ________ but not congruent.

• Similar

• Flipped

• Rotated

• Congruent

Dilations will always keep the same ________

• Orientation

• Size

• Area

• Perimeter