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This Angles in Polygons instructional video also includes:
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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Concepts
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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