Scale Factors Calculating

Scale Factors Calculating

Logic

• If my shape gets bigger

• my numbers will be.....

• BIG!

Logic

• If my shape gets smaller

• my numbers will be.....

• small!

I can calculate scale factor!

• second number

• divide by

• first number

I can calculate scale factor!

• 1:5

• so second number divide by first number

• 5/1

• =5

• does that make sense? should our number be big or small?

• BIG!

I can calculate scale factor!

• 9:1

• so second number divide by first number

• 1/9

• =0.11

• does that make sense? should our number be big or small?

• small!

Multiple Choice

Find the scale factor of:

1:2

• 0.5

• 2

• 0.36

• 3

Multiple Choice

Find the scale factor of:

3:1

• 0.5

• 2

• 0.33

• 3

Multiple Choice

Find the scale factor of:

1:4

• 0.25

• 4

• 0.33

• 3

Multiple Choice

Find the scale factor of:

1250:1

• 0.0008

• 4

• 0.33

• 1250