Angles in Polygons

New Review

Learn to look at polygons from the right angle. Scholars first use the formula (n - 2) * 180 to determine the sum of the interior angles of a polygon. The video then asks them to consider the sum of the exterior angles.

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Instructional Ideas

  • Use the worksheet as an in-class assignment
Classroom Considerations

  • Pupils should be able to evaluate formulas
  • Video assumes use of a calculator
Pros

  • Covers several examples for each type of problem
Cons

  • Does not explain why the formula for the sum of interior angles works