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.

Concepts

polygons, regular polygons, interior angles, exterior angles

Show More Show Less

Additional Tags

math

Show More Show Less

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