An n-sided pyramid is a polyhedron formed by connecting an n-sided polygonal base and a point, called the apex, by n triangular faces (n ≥ 3). When unspecified, the base is typically assumed to be square. For a triangular pyramid each face can serve as base, with the opposite vertex as apex.


The volume of a pyramid is

V=1/3 AH

where A is the area of the base and h the height from the base to the apex. This works for any location of the apex, provided that h is measured as the perpendicular distance from the plane which contains the base.

See Pyramid Surface Area

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