Unit Two: Dilations

What type of transformation enlarges or shrinks a shape?

• translation

• dilation

• rotation

• reflection

What do we multiple our coordinates by when a dilation is occurring?

• a whole number

• a fraction

• different numbers

• scale factor

Triangle ABC was dilated using the origin as its center of dilation to create triangle A'B'C'. What is this dilation's scale factor?

Square ABCD has side lengths that are 9 inches long. The square is dilated to create square A'B'C'D'. Square A'B'C'D' has side lengths that are 3 inches long. Which scale factor was used to dilate square ABCD?

• 3

• 1/3

• 4

• 1/5

Which scale factor will produce an enlargement?

• 5

• 0.3

• 1/2

• 1

Which scale factor will produce a reduction?

• 8

• 1

• 0

• 0.9

Which dilation rule would be used to make a shape get larger?

A figure is dilated using a scale factor greater than 1. What happens to this figure?

• preserves

• enlarges

• reduces

• disappears

A scale factor between zero and one is used to dilate a figure. What happens to this figure's size?

• enlarges

• preserves

• reduces

• turns to zero