Scale Factor

what is the length of x?

• 9mm

• 4mm

• 4/9mm

• 36mm

If a copy has a scale factor of 1/2 it is

• bigger

• smaller

• the same size

If a copy has a scale factor of 6 then it is

• bigger

• smaller

• the same size

what is the scale factor?

• 1

• 3

• 1/3

• 8

A photo has dimensions 12 x 6. Bob wants to get an enlargement that has scale factor 3. What are the dimensions of the new photo?

• 36 x 18

• 15 x 9

• 18 x 9

• 4 x 2

What is the scale factor from triangle ABC to triangle DEF?

• 1/2

• 7/3

• 2/1

• 10/3

The pair of figures is similar. Find the missing side.

• x = 12

• x = 3

• x = 40

• x = 4

The scale drawing car length is 3 cm. If the scale is 1 cm:4 ft, what is the actual car length?

• 12 feet

• 16 feet 

• 10 feet

• 4 feet

Find missing side

• 5

• 7

• 9

• 11

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

• 21

• 1.25

• 20

• 4