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Geometry - three dimensional shapes
Polyhedra
Faces, Edges & Vertices
Polyhedra Basics
Polyhedra Nets 1
Polyhedra Nets 2
Polyhedra: Formula for Edges
Polyhedra: Formula for Vertices
Polyhedra Nets on the Computer: 1
Polyhedra Nets on the Computer: 2
Vocabulary: Tetra
Spatial Visualization
Spatial Visualization: Part 1
Spatial Visualization: Part 2
Spatial Visualization: Part 3
Spatial Visualization: Part 4
Spatial Visualization: Part 5
Sphere Basics
Sphere or Archimedean Solid?
Sphere or Platonic Solid?