Scale Factor and Copies

Which of the following are scaled copies of the original portrait? Select ALL the apply.

• A

• B

• C

• D

• E

What is the scale factor from ΔABC to ΔDEF?

• 1/2

• 7/3

• 2

• 10/3

• 0.25
• 0.5
• 2
• 1/2

If the scale factor is 4, what is the measurement of slide length x?

• 21

• 1.25

• 20

solve number 1

Mathematical Equivalence

ON

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

scale factor = _______

Mathematical Equivalence

ON

A scale drawing of Mt. Marcy is 17.8 inches high. Determine the actual height of Mt. Marcy if the scale used for the drawing was 1.5 inches = 450 feet.

• 8,010 feet

• 5,340 feet

• 12,015 feet

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

• 21

• 1.25

• 20

• 4

How much did the angles increase in the scale copy?

• They are twice as large

• They are 4 times as large

• Angles do not change in scale copies

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

Mathematical Equivalence

ON