Third graders are exposed to finding the area of polygons by decomposing figures and recomposing them into rectangles. This strategy allows children to expand on their prior knowledge of constructing shapes by rearranging parts into squares. 

Concepts

area, area of polygons

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Additional Tags

math

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Instructional Ideas

• Ideal for using as a guided practice in order to establish connections between composing shapes and finding their areas

Pros

• Incorporates simple and challenging figures
• Includes solution page

Cons

• None

Common Core

3.MD.C.6 3.MD.C.7.a 3.MD.C.7.d MP1 MP2 MP5 MP7