Section outline

    • Important points:

      1. 2-D shapes = plane figures

      2. 3-D shapes = solid figures

      3. Vertices  = corners 

      4. Edges = line segments

      5. Faces = flat surfaces

      6. Isometric sketch is drawn of  isometric dot paper

      7, Oblique sketch  does not have proportional lengths.

      8. 

      Shape Vertices Edges Faces
      Cube 8 12 6
      Cuboid 8 12 6
      Cone 1 1 2
      Cylinder 0 2 3
      Sphere 0 0 1
      Square pyramid 5 8 5
      Triangular pyramid 4 6 4
      Tetrahedron  4 6 4
      Square prism 8 12 6
      Triangular prism 6 9 5