Scale Factor& Dilation

Think-pair-share:

https://www.youtube.com/watch?v=hrSZVj6IqXA&feature=fvwrel

Enlargementmultiply by a # greater than 1

BOB- Big Ol Bear

27 pounds

$150

Worlds Largest Gummy Bears

5 pounds

$30

1.5 cm

3 c

m

Scale factor: 12

Enlargement

Scale Factor: 9 1

2

Scale Factor: 3.3

Scale Factor: 1.4

1.5 cm

3 c

m

1.5 cm

3 c

m

1.5 cm

3 c

m

ReductionMultiply by a # less than 1

5 inches8

inch

es

Scale Factor: 0.75

5 inches

8 in

ches Scale

Factor: 0.25

5 inches

8 in

ches

5 inches

8 in

ches

ScaleFactor:

15

ScaleFactor:

13

Activity:1) choose an object and place it on table

2) write your scale factor on index card

enlargement: 1.9-100

deduction: 0.0-0.99

3) place card next to object

4) using worksheet, find at least 5 enlargements & 5 deductions