Determining Rectilinear Area

This Determining Rectilinear Area worksheet also includes:

Third graders find the area of rectilinear shapes by partitioning them into two non-overlapping rectangles and adding the areas of the non-overlapping parts together. It allows learners to recognize area as an additive.

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CCSS: Designed
Instructional Ideas

  • Use as a quiz, classwork, or homework
Classroom Considerations

  • It is important to note to students that given side lengths can change when decomposing the shapes. Determining the new side length will stump children at first in which extra support will be necessary
  • Each worksheet has 10 problems for solving
  • There is more than one way to partition the rectilinear shapes
  • Notebook paper may be necessary for working out problems
Pros

  • All 10 versions of the worksheet include answer keys
Cons

  • None
Common Core