Scale Drawing

A drawing that shows an object or area reduced or enlarged by a certain ratio called a scale.

A drawing that is always the same size as the real object.

A drawing that does not use any measurements.

A drawing that only uses colors to represent objects.

Scale: The number by which each measurement is multiplied

Ratio: A simplified representation of a physical object

Model: The ratio between the measurements on the drawing and the actual object

Scale Factor: The number by which each measurement on the model is multiplied to get the actual size

150 cm

250 cm

1200 cm

1500 cm

12.5 m

7.5 m

10 m

15 m

10 in

18 in

12 in

15 in

Divide the length of each side in the scale drawing by 16.

Add 16 to the length of each side in the scale drawing.

Multiply the length of each side in the scale drawing by 16.

Multiply the length of each side in the scale drawing by 1.

F

G

H

J

L= 1

H= 3/4

L= 4

H= 3

L= 16

H= 12

L= 2/3

H= 3/5

14 in 

7 in

42 in

56 in

A

B

C

D

12 feet

16 feet 

10 feet

4 feet

The new image is a scale drawing with a scale factor of $$2$$ .

The new image is a scale drawing with a scale factor of $$\frac{1}{2}$$

The new image is not a scale drawing because there is no scale factor.

The object was not changed proportionally.