Theory
How do you calculate a scaled length?
Scale 1 to n means that the drawing is n times smaller than reality.
When going from reality to a drawing, you calculate back.
Divide the actual length by the scale factor n to find the length on the drawing.
- Divide by the scale factorFor a scale of 1 : n, divide the actual length by n.
Dividing means sharing an amount fairly or seeing how many equal groups fit into it.
The first number is the total amount. The second number tells you what you divide by.
Always check whether the division works out exactly. If it does not, you get a decimal number or fraction as the answer.
The scale is 1 to 50. In reality, something is 200 cm. How long is it on the drawing?
- Divide by the scale factor200 ÷ 50 = 4.