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MIDDLE SCHOOL

Mathematics (Grade 7)

Geometry

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Geometry: Scale Drawings and Proportional Geometry

Area in Scale Drawings

Description

Area in Scale Drawings

Introduction

Scale drawings can be used to find actual areas. Lengths change by the scale factor, while areas change by the square of the scale factor.

Theory

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Transcript

A coach examines a rectangular soccer field drawing using a one-inch to twenty-meter scale.

The drawing is five inches long and three inches wide.

The coach wants to find the actual area in square meters.

One way is to find the actual dimensions first. Using the scale, the length is five inches times twenty meters per inch, or...

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