Scaling and Scale Factors

What is the area of a scale drawing of a triangle with a base of 2 and a height of 3, if K = 3 (K = scale factor)

Which of the following is a scaled copy of figure A?

• B

• C

• D

Which side length on the scaled copy corresponds to the side length HJ on the original image?

• AB

• BC

• AC

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

• 9

• 1.25

• 20

• 4

What is the scale factor from ΔABC to ΔDEF?

• 1/2

• 7/3

• 2

• 10/3

_________ ________ is the number you multiply by the sides to create a scaled copy.

• Scale Factor

• Corresponding Angle

• Pi

• Mid Point

Scale factor is _________

• the number you multiply the original shape by in order to get the scale copy

• the number you divide the original shape by in order to get the scale copy

• the number you add the original shape by in order to get the scale copy

• the number you subtract the original shape by in order to get the scale copy

What is the scale factor?

• 1

• 2

• 1/2

• -2

Is Figure B a scaled copy of Figure A?

• Yes

• No

What is the scale factor from the original triangle to its copy?

• 1/2

• 5

• 1/4

• 1/5