Dilations

What are the coordinates of point B where the center of dilation is the origin and the scale factor is ½?

• (1.5, -4)

• (-1.5, 1)

• (-1, -1.5)

• (-2, -2)

What scale factor was used to produce the image?

• 2

• -2

• ½

• 1

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

• ½

• ¼

• 4

• 2

A dilation is which of the following

• Only an enlargement

• Only a reduction

• An enlargement or reduction

• Neither an enlargement or reduction

What is the term for the amount a shape is dilated by?

• Enlargement

• Reduction

• Dilation rule

• Scale factor

What is FALSE about dilations?

• The shape is the same.

• The size changes.

• Dilations can only occur with whole number scale factors.

• Dilations produce similar figures.

After a shape has been dilated, the angles are

• Similar

• Congruent

• Smaller

• Larger

Dilate Point C by a scale factor of 3. What are your new coordinates for C'?

• (12,0)

• (12,12)

• (1, 2/3)

• (9, 6)

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

• 16

State the coordinate of the image of point B (-10,-6) after a dilation with a scale factor of 1/2.

• (5,3)

• (20,12)

• (-20,-12)

• (-5,-3)