Solids

The envelope of a triangular pyramid

The envelope of a triangular pyramid

  • Lesson Aims
  • Investigate pyramids

    • Description of a pyramid, number of faces,edges and vertices.
    • Recognition of a triangular pyramid and envelope of a pyramid.
    • Pyramids with different bases.
  • Model Name
  • Envelope of a triangular pyramid.

  • Lesson structure
  • First lesson on the topic of 3-D solids.

  • Lesson content
  • Pupils will construct a triangular pyramid, investigate the properties of this pyramid, the envelope of this pyramid constructed from triangles and comparison of  the envelope and the solid.

  • Prior knowledge
  • Polygons and triangles.

Themes: Solids

The envelope of a triangular pyramid

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