New
New
Year 10
Foundation
Checking and securing understanding of drawing accurate scaled diagrams
I can draw an accurate scaled diagram using a suitable choice of scale.
New
New
Year 10
Foundation
Checking and securing understanding of drawing accurate scaled diagrams
I can draw an accurate scaled diagram using a suitable choice of scale.
Lesson details
Key learning points
- Given the real measurements, a suitable scale factor can be chosen.
- The scale factor should mean the scaled diagram is easy to draw accurately.
- The scale factor can be determined by the units.
- The scale factor used should always be clearly written next to the scaled diagram.
Common misconception
Misinterpreting a scale, particularly if given with no units.
Encourage pupils to carefully convert the scale into a more useful scale. E.g. writing 1 : 20 0000 as 1 cm = 2 km
Keywords
Scale factor - A scale factor is the multiplier between similar shapes that describes how large one shape is compared to the other.
Degree of accuracy - A degree of accuracy shows how precise a number or measurement is.
If your class need scaffolding they can be given a scale for question 3 on task B. Scales can also be tailored to suit the ability of pupils you are delivering the lesson to.
Teacher tip
Licence
This content is © Oak National Academy Limited (2024), licensed on Open Government Licence version 3.0 except where otherwise stated. See Oak's terms & conditions (Collection 2).
Video
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Starter quiz
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6 Questions
Q1.
Variables are in proportion if they have a multiplicative relationship.
different
changing
unrelated
Q2.
If 1 cm = 20 km, how many kilometres are represented by 5 cm?
Q3.
If 1 cm = 20 km, how many centimetres represent 180 km?
Q4.
The scale on a map is 1 : 300 000. The distance between two places on the map is 6 cm. What is the distance in real life in kilometres?
Q5.
The scale on a map is 1 : 400 000. The distance between two places in real life is 34 km. What is the distance between them on the map?
Q6.
The scale of a model building is 1 : 200. The height of a model block of flats is 5 cm. How tall is the block of flats in real life?
Exit quiz
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6 Questions
Q1.
A factor is the multiplier between similar shapes that describes how large one shape is compared to the other.
Q2.
In the scale 1 : 500, 1 cm = 5 .
Q3.
For which of the following sketches is the scale 1 : 50 appropriate?
Q4.
Which is the most appropriate scale to draw an accurate scaled drawing of this plan of a house?
1 : 3
1 : 400
1 : 500
1 : 4000
Q5.
Using the scale 1 : 500 which are the correct dimensions of the scaled drawing of this field?
0.4 cm × 0.6 cm
4 cm × 6 cm
400 cm × 600 cm
Q6.
Using the scale 1 : 500 which are the correct dimensions of the real life field?
1.3 m × 2.55 m
1.3 km × 2.55 km
13 km × 25.5 km