## Pyramid

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.

Volume of a Pyramid:

The volume of a pyramid is

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.

Surface Area of a Pyramid: