1. True measurements
and scale
measurements

2. Why do we need to use scale to
draw objects or house plans etc.?
We couldn’t
possibly fit the
true measurements
of a new house or a
new design for a
playground onto a
piece of paper.

3. What jobs is this skill important
for?
Architect Construction workers
Drafters

4. 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

5. Ready to try some examples?

6. • Imagine this house measures 10 cm in length.
• The scale used here is 1cm = 2.5m
• This means that every centimetre we draw
actually represents 2.5 metres length in real
life.
So if the house
measures 10cm in
length what is the true
length of the house?
10x2.5=25
25m true length

7. Let’s try another one!
• The height of the scale
drawing of this boat is 23cm.
• The scale is 1cm=7m
• How will we work out the true
height of the boat?
• Remember every centimetre is
worth 7 metres in real life.
• 23x7=161
• True height is 161 metres!