1. Friday, January 25, 2013
SCALE DRAWING
AIRIL AHMAD
SMK PERIMBUN

3. Friday, January 25, 2013
EXERCISE
Drawing

4. Friday, January 25, 2013
SCALE DRAWING
Scale = Length of a side of the drawing
Length of corresponding side of the object
D
Scale =
O

5. DC= 4UNITS
E Object D D’C’= 2UNITS
D
A Scale =
O
2
Scale =
4
1
Scale =
2
Drawing D’
E’
B C
A’
B’ C’

6. Object
DC= 4 units
D’C’= 2 units Scale = 2 : 4
D 2 4
Scale = Scale = :
O 2 2
2
Scale =
4 Scale =1: 2

7. DC= 3UNITS Scale = 2:1
Object B D’C’= 6UNITS
2 2
A Scale = 6:3
Scale = 2:1
Scale = 1: 1/2
Drawing B’
D C
A’
D’ C’

8. Object
DC= 3 units Scale = 6 : 3
D’C’= 6 units 6 3
Scale = :
D 6 6
Scale =
O 31
Scale =1:
6 62
Scale =
3 1
Scale =1:
2

9. Friday, January 25, 2013
EXERCISE
Scale

10. EXERCISE 1:Find the scale
3 cm
Drawing
6 cm
Object 6 cm
12 cm

11. EXERCISE 2:Find the scale
Drawing
Object 5 cm
15 cm

12. EXERCISE 3:Find the scale
Object
Drawing 4 cm
16 cm

13. EXERCISE 4:Find the scale
Drawing
3 cm
Object
24 cm

14. EXERCISE 5:Find the scale
2 cm
Object
6 cm
Drawing

15. EXERCISE 6:Find the scale
5 cm
Drawing 20 cm
Object

16. EXERCISE 7:Find the scale
Object
6 cm
Drawing
18 cm

17. Friday, January 25, 2013
MAPS AND PLANS
AIRIL BIN AHMAD

18. Friday, January 25, 2013
MAPS AND PLANS
1:10 000
Means
1cm on the map and 10 000cm on the ground
The ratio 1 is called the representative fraction (RF)
10 000
AIRIL BIN AHMAD