1. What does it mean when a drawing is not to scale?

2. Where can a scale be used?
Scale Drawings
Where can a scale be used?

3. Draw objects, plans or maps!
We couldn’t possibly fit the true measurements of a new house or a new design for a playground onto a piece of paper.

4. What jobs is this skill important for?
Architect
Construction workers
Architects and drafters work together – architects more on buildings and constructions and need to take into consideration aesthetics and economics – drafters have a wider range can wok on circuits and machinery and are more technical
Drafters

5. How do we use scale measurements?
It is important that the drawing is measured accurately using the scale.
The measurements must make an exact copy of the real object/building but in a smaller size like a replica of a car

6. The scale of this drawing is 1cm = 25cm
25 x 4 = 100cm
4cm
2cm
25 x 2 = 50cm
The scale of this drawing is 1cm = 25cm
What is the actual width and height of the TV ?

7. 25m is the true length of the house
Imagine this house measures 10 cm in length.
The scale used here is 1cm = 2.5m
1cm : 2.5m
10cm : ?
10cm : 25 m
25m is the true length of the house
x10
x10

8. The height of the scale drawing of this boat is 23cm.
The scale is 1cm=7m
What is the true height of the boat?
161m

9. If the width of the true/real/actual boat is 70m.
The scale is 1cm=7m
What is the width of the drawing?
161m

10. Scale Drawing
Scale drawings allow us to draw large objects on a smaller scale while keeping things accurate & in proportion!

11. The scale may be given in 2 ways
WAY 1: Given units  1cm = 400km
(units given because they are different)
WAY 2: No units given  1 :
This means that the 1 and are of the SAME units
On a paper, you will most likely consider cms
1cm corresponds to 50,000 cm (500m) in real-life!

12. Worksheet