Adding It All Up

New Review

Analyze patterns to create a formula for the interior angle sum of polygons. Youth begin by drawing and triangulating polygons. They then record the number of triangles, number of sides, and total angle measures to help create their formulas.

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CCSS: Designed
Instructional Ideas

  • Review polygon vocabulary prior to the activity
  • Encourage pupils to create their own formulas; compare and contrast the unique formulas
Classroom Considerations

  • Gather the necessary materials prior to the activity
Pros

  • Includes an answer key
  • Provides questioning strategies to use throughout the activity
Cons

  • None
Common Core