3D Primitive Shapes

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Across
  1. 2. a solid or hollow object which tapers from a circular or roughly circular base to a point
  2. 3. a long, hollow cylinder
  3. 4. three-dimensional analogue to a two-dimensional circle
Down
  1. 1. an object (as the moon) shaped like a ball; three-dimensional analogue to a two-dimensional circle
  2. 2. three-dimensional solid; a prism with a circle as its base.
  3. 3. revolving a circle in three-dimensional space; the surface has a ring shape