Scale Factor from A to B

What is the formula for scale factor?

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

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

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

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

Two objects that are the same shape but not the same size are _______.

• Congruent
• Vertical
• Similar
• Complementary 

A ~ B. What is the scale factor of the dilation of A to B?

• 3

• 4

What is the scale factor from triangle ABC to triangle DEF?

• 1/2
• 7/3
• 2/1
• 10/3

ABC ~ XYZ. What is the scale factor of the dilation of ABC to XYZ?

• 2

• 3

What is the scale factor from the large triangle to the small triangle?

• 1/2
• 2/3
• 3/4
• 2

What is the scale factor from ABCD to MNOP?

• 2/3
• 3/2
• 2
• 3

What is the scale factor from the smaller quadrilateral to the larger?

• scale factor = 4
• scale factor = 10
• scale factor = 3
• scale factor = 2