Find the Perimeter of a Rectangle Using an Area Model

This Find the Perimeter of a Rectangle Using an Area Model video also includes:

A real-world problem is posed at the beginning of the fourth of six lessons on applying formulas for area and perimeter. A review of the definition of squares and rectangles begins the discussion, followed by an example of solving a perimeter problem using an area model and a reminder of the difference between area and perimeter. The lesson concludes by talking through and visually demonstrating how to solve the problem posed at the video's start.

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CCSS: Designed
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Classroom Considerations

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Pros

  • Two examples of solving a perimeter problem using an area model help encourage understanding
Cons

  • The visual example provided in the first problem only explores one option for using the area model, counting by ones; ask your class to find other strategies, such as skip counting or adding
  • The common mistake section reviews area versus perimeter, but would fit better before the first area problem instead of after
Common Core