Two-d or not two-d? That's not really the question because the figures here are all two-dimensional. Learners identify the names of polygons, starting with triangles and ending with decagons. The video also describes circles and semicircles.

Concepts

2-d shapes, geometric shapes

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Additional Tags

math

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Instructional Ideas

• Have the class create flashcards for the shape names
  

Classroom Considerations

• It is helpful if pupils have knowledge of prefixes, such as tri-, penta-, etc.
• Note that the intended audience is scholars studying for the GCSE
  

Pros

• Includes a worksheet with practice problems
  

Cons

• A poster showing shapes and names would be sufficient for the lesson
  

Common Core

2.G.A.1