The Area of All Polygons Through Composition and Decomposition

To compose or decompose, that is the question. The fifth portion of a 22-part series presents area problems of polygons. Pupils determine how to compose or decompose the polygons into shapes whose area is easily calculated. 

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CCSS: Designed
Additional Tags
Instructional Ideas
  • Discuss whether it would make a difference in finding missing lengths if the figure was not rectangular
  • Have individuals share the way they either found areas by composition of decomposition
Classroom Considerations
  • Print the figures to allow learners to cut and manipulate them
Pros
  • Contains scaffolding suggestions for extensions and remediation
  • Includes the numerical calculations used to find the area
Cons
  • None
Common Core