Theory
How do you calculate the actual length with a scale?
Scale tells how large something on a drawing is compared with reality.
With a scale of 1 to n, 1 cm on the drawing corresponds to n cm in reality.
When you go from drawing to reality, you multiply the length on the drawing by the scale factor n.
- Multiply by the scale factorFrom drawing to reality, you multiply by the scale factor.
You use multiplication with equal groups.
A × B means that you take the same amount B, A times.Instead of adding again and again, you calculate the product all at once.
A map has a scale of 1 to 100. A line is 6 cm on the map. How long is that line in reality?
- Multiply by the scale factor6 × 100 = 600.