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Geometry and Spatial Reasoning · Weeks 28-36

Area of Composite Shapes

Finding the area of rectilinear figures by decomposing them into non-overlapping rectangles and adding the areas of the non-overlapping parts, applying this technique to solve real-world problems.

Key Questions

  1. Design a method to decompose a complex rectilinear figure into simpler rectangles for area calculation.
  2. Explain how the distributive property relates to finding the area of composite shapes.
  3. Evaluate the most efficient way to decompose a given rectilinear figure.

Common Core State Standards

CCSS.Math.Content.3.MD.C.7.cCCSS.Math.Content.3.MD.C.7.d
Grade: 3rd Grade
Subject: Mathematics
Unit: Geometry and Spatial Reasoning
Period: Weeks 28-36

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