Online Pre-Algebra Tutoring: Scale Drawings

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Learn about  Scale Drawing from Certified Online Pre-Algebra Tutor

A scale is a ratio that compares the measurement used in the drawings to the actual measurements. Scale drawings are similar to the actual drawing or figure and therefore the sizes are proportional

The ratio used while working with scale drawings is

Scale measurement / Actual measurement

Let’s understand with an example:

Kate measured a house and its lot and made a scale drawing. In real life, the back patio is 24 meters wide. It is 3 millimeters wide in the drawing. What scale did Kate use?

Write the ratio of the width of the patio in the drawing to the width of the actual patio. Write the ratio in fraction form.

Simplify the fraction.

The scale of the drawing is 1 millimetre = 8 meters.