The plain scale
Power Mechanics · Grade 10 · about 40 minutes
What a plain scale is, how it is read from either side of zero, and the limit that makes a diagonal scale necessary.
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- 7 sections of explanation, worked examples and diagrams
- 1 practice task with hints and worked answers
- A quiz that marks itself as you go
- Your progress kept across every subject you take
Other lessons in this sub-strand
- What a scale is, and why drawings need one
- Representative fraction
- Full size, reduction and enlargement
- Calculating with a scale
- The plain scale
- Constructing a plain scale
- Why the diagonal scale exists
- The principle of diagonal division
- Constructing a diagonal scale
- Reading a diagonal scale
- Where scales are used
- Common errors, and how to check a scale