Measurement and Surface Area · Measurement and Geometry

Area of Composite Shapes

Breaking down complex 2D shapes into simpler components to calculate total area.

Key Questions

  1. 1How does decomposing a shape into smaller parts simplify the process of finding its total area?
  2. 2Why must we be careful not to double count overlapping sections in composite figures?
  3. 3When is it more efficient to subtract a smaller area from a larger boundary than to add parts?

ACARA Content Descriptions

AC9M9M01
Year: Year 9
Subject: Mathematics
Unit: Measurement and Surface Area
Period: Measurement and Geometry

Suggested Methodologies

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