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Cone

Cone

A three dimensional figure with a single base tapering to an apex. The base can be any simple closed curve. Often the word cone refers to a right circular cone.

 

Two cone diagrams: Oblique and Right. Both show h=height, B=base area, Volume=(1/3)Bh. Oblique cone tilts; right cone is upright.                       Double cone (hourglass shape): two right circular cones joined at their apex, one pointing up, one pointing down.
                                                                        Double Cone

 

See also

Right cone, oblique cone, circular cone, frustum of a cone or pyramid, height of a cone, volume, lateral surface, lateral surface area, surface area