What shapes classify as a polygon? The resource provides the definition of a polygon and provides examples of polygons and shapes that are not polygons. The presentation gives an explanation of why each shape falls into the particular category based on the definition.

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Instructional Ideas

  • Provide drawings of geometric shapes, have class members determine whether the shape is a polygon or not and why
  • Have pupils develop their own informal definition of a polygon
Classroom Considerations

  • Individuals should have a basic knowledge of line segments, angles, and planes

  • The section on identifying polygons is a game show format
  • Provides the names for some special polygons

  • None