Scale Factor with Geometric Figures

The two figures are similar. What is the scale factor going from the smaller figure to the larger figure?

• 6/5

• 5/6

• 25/36

• 36/25

Are the two figures similar

• yes

• no

The two figures are similar. Find the indicated side length.

• 15

• 45

• 10

• 16

The two figures are similar. Find the indicated side length.

• 15

• 24

• 16

• 18

Enlargement or reduction?  Find the scale factor!

• 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.

Which is true about the scale factor when a figure is enlarged? (a)  

• The scale factor is zero.

• The scale factor is 1.

• The scale factor is larger than 1.

• The scale factor is smaller than 1.

Choose the correct scale factor:

• 2.5

• 1.5

• 3.5

• 4

Match the scale factor to the corresponding figure change.

• Enlargement

• Scale Factor = 1

• No Change

• Scale Factor < 1

• Reduction

• Scale Factor > 1

If an image is enlarged by a factor of k, then k must be ​ (a)   ​ (b)   .

• greater than

• less than

• 1

• equal to

• 0

The two figures are similar. Find the indicated side length.

• 12

• 24

• 26

• 16