Intro to Scale Factor and Dilations

What is the scale factor from the small shape to the big shape?

• 1/2
• 7/3
• 2
• 10/3

If the scale factor is less than one, the new figure will be

• an enlargement
• a reduction
• a scale factor
• bigger

If the scale factor is greater than one, the new figure will be

• a reduction
• an enlargement
• a scale
• not proportional

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

• ½

• ¼

• 4

• 2

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

• addition 
• subtraction 
• multiplication 
• division 

A dilation produces a congruent figure

• True

• False

If the blue polygon is the original image, find the scale factor and determine if it is a reduction or enlargement.

• It's a reduction; the scale factor is 2.

• It's an enlargement; the scale factor is 2.

• It's an enlargement; the scale factor is 1/2.

• It's a reduction; the scale factor is 1/2.

Triangle ABC will be dilated by a scale factor of 1/2.  What will be the coordinates of C'?

• (-1, -2.5)
• (12, 6)
• (3, -1.5)
• (0, 1.5)

Rectangle ABCD is dilated so that A' is located at (3, 6). What could be the scale factor?

• -1/4

• -4

• 1/4

• 4