Dilations Transformations

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

• reduction

• enlargement

• scale factor

• center of dilation

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

• ½

• ¼

• 4

• 2

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

• (5,3)

• (20,12)

• (-20,-12)

• (-5,-3)

A scale factor of 1/2 reduces a figure.

• True

• False

Did the image enlarge, reduce or none of the above?

• Enlarge

• Reduce

• None of the above

Dilate Point B by a scale factor of 3:

• (12,0)

• (12,12)

• (4,3)

• (0,12)

Dilate Point C by a scale factor of 3:

• (12,0)

• (12,12)

• (1, 2/3)

• (9, 6)

Is this an enlargement or a reduction?

• Enlargement

• Reduction

Is this an enlargement or a reduction?

• Enlargement

• Reduction

Triangle DOG has coordinates D (0,0) O (0,4) and G ( 1,5) where is O' after a dilation of scale factor 7

• (7,35)

• (7,28)

• (0,28)

• (0,0)