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Scale drawings are used to design a broad range of different projects. Gardens, kitchens and even spacecraft have all been constructed by following a scale drawing.

Look at this scale drawing:

It is a design for a bungalow. You should notice that the dimensions for the rooms are in millimetres. This is common in the building trade as precision is very important. The dimensions for the outside are in metres.

There are three types of questions you can be asked when studying scale drawings:

• the first type involves calculating the scale factor of the drawing, in other words what scale label should be present on the diagram
• the second type of question you could be asked is to work out how large an object from a plan is in real life using measurements and a given scale
• finally, you could be asked to produce a scale drawing from a given scale factor and measurements