Intro to Scale Factor

Triangle DOG has coordinates D (0,0) O (0,4) and G ( 1,5) where is O' after a dilation of scale factor 7

• (7,35)

• (7,28)

• (0,28)

• (0,0)

Triangle CAT has coordinates C (4,8) A (6,10) and T ( 6,4) where is A' after a dilation of scale factor of 1/2 

• (6,10)

• (3,2)

• (3,5)

• (0,0)

Which scale factor is the most reasonable estimate?

(For turning the green hexagon into the blue.)

• 0.2

• 0.4

• 0.6

• 0.8

Which scale factor is the most reasonable estimate?

(For turning the green L-shape into the blue.)

• 0.25

• 0.5

• 1

• 2

• 4

Which scale factor is the most reasonable estimate?

(For turning the green hexagon into the blue.)

• 0.25

• 0.5

• 1

• 2

• 4

First, identify the old and new image. Now, did the triangle get bigger or smaller?

• The triangle got smaller

• The triangle got bigger

Did the image enlarge, reduce or none of the above?

• Enlarge

• Reduce

• None of the above

The point A (8, 12) was dilated to become point A' (2, 3). What was the scale factor?

• ½

• ¼

• 4

• 2

In a dilation what mathematical operation is used with the scale factor?

• addition 

• subtraction 

• multiplication 

• division 

If your SF = 6/5, what type of dilation is it?

• Reduction

• Enlargement