Scale Drawing

CHAPTER 4

SCALE DRAWING

PN. SAZAZILA ABDULLAH

WORD BANK

original - asal
geometrical shape - bentuk geometri
degree - darjah
grid - grid
sketch - lakar
object - objek
size - saiz
scale - skala

What will you learn?

4.1 Scale Drawings

Why do you learn this chapter?

-Scale drawings are used to give an idea of object
measurements of actual distances .

- Scale drawings are frequently used in architecture ,
engineering , photography , technological design , and so
on .

4.1 Scale Drawings

What is the relationship between the actual
measurements and the measurements of various
sizes of drawings of an object ?

Do you know that the maps found in navigation
software are drawn to a certain scale ?

The distance between two towns shown in the
software is proportional to the actual distance .

For example , the distance between Johor Bahru ad
Kuala Lumpur is shown using a scale of
1 cm : 50 km



• Scale drawing is the drawing of an object with all
measurements in the drawing proportional to the
measurements of the subject .

How do you interpret the scale of a
scale drawing?

measurement of scale drawing : measurement of object

Scale  measuremen t of a scale drawing
measuremen t of object

How do you interpret the scale of a
scale drawing?

• we use scale in the form of
ratio ,

• 1 : n , where n is a positive
integer or fraction

How do you interpret the scale of a
scale drawing?

4 :2
1: 1

2

2 cm 4 cm If n < 1 , then the size
object of the scale drawing is
scale bigger that the size of
drawing the object

How do you interpret the scale of a
scale drawing?

2:4
1: 2

4 cm 2 cm If n >1 , then the size of
object the scale drawing is
scale smaller that the size of
drawing the object

How do you interpret the scale of a
scale drawing?

2:2
1:1

2 cm 2 cm If n =1 , then the size of
object the scale drawing is the
scale same as the size of the
drawing object

Thank you