Scale Factor and Scale Copy

What is the scale factor from ΔABC to ΔDEF?

• 1/2

• 7/3

• 2

• 10/3

• 0.25
• 0.5
• 2
• 1/2

What is the scale factor if the triangle on the left is the original?

• 2

• 3/2

• 2/3

• 1/2

What is the scale factor?

• 4

• 25

• 5

• 6

In the figure above, a dilation from A to A' has occurred. What is the scale factor?

scale factor = _______

Mathematical Equivalence

ON

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

• an enlargement

• a reduction

• a scale factor

• bigger

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

• reduction

• enlargement

• scale

• not proportional

The two rectangles are scale drawings. What is the measurement of x?

• 21

• 1.25

• 20

• 4

Which triangle is similar to the above triangle ?

• A

• B

• C

• D

Are the following similar? Why or why not?

• Yes

• No, the corresponding angles are not equal.

• No, the scale factors of the corresponding sides are not equal.