Answer :

The scale is a ratio of the size of the drawing to the size of the original object being drawn. This may be referred to as a scale ratio. For example, if the scale is 1 cm : 3 cm, then the length of 1 cm in the drawing represents 3 cm in true size (or original size).

Scale (ratio) The scale ratio of a model represents the proportional ratio of a linear dimension of the model to the same feature of the original.

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