A scale 1:n compares drawing length with actual length in the same units. Choose a scale that fits the paper, convert the dimensions before drawing, and measure only a drawing known to be at that scale. Example A rectangular room is 8 m by 5 m. At scale 1:100, draw 8 cm by 5 cm, using a set square for right angles. A measured 2.4 cm doorway position represents 240 cm=2.4 m. For a route or site plan, draw a north line and use the protractor clockwise from north for a bearing. For example, a 3 km route on bearing 060, at 1 cm:0.5 km, is a 6 cm segment making 60 clockwise with north. Measurement introduces small errors; quote realistic accuracy.

A scale \(1:n\) compares drawing length with actual length in the same units. Choose a scale that fits the paper, convert the dimensions before drawing, and measure only a drawing known to be at that scale.

A rectangular room is \(8\text{ m}\) by \(5\text{ m}\). At scale \(1:100\), draw \(8\text{ cm}\) by \(5\text{ cm}\), using a set square for right angles. A measured \(2.4\text{ cm}\) doorway position represents \(240\text{ cm}=2.4\text{ m}\).

For a route or site plan, draw a north line and use the protractor clockwise from north for a bearing. For example, a \(3\text{ km}\) route on bearing \(060^\circ\), at \(1\text{ cm}:0.5\text{ km}\), is a 6 cm segment making \(60^\circ\) clockwise with north. Measurement introduces small errors; quote realistic accuracy.

Scale drawings

Scale drawings