If the apex of the pyramid does not lie directly on top of the centre of the base, the pyramid is an oblique pyramid.
If the apex of the pyramid lies directly on top of the centre of the base, the pyramid is a right pyramid. The lateral edges may be different in length.įor all types of pyramids the cross sectional areas are similar to each other as illustrated in the diagrams below. The base shape of an irregular pyramid is an irregular polygon (a 2D shape with straight sides which vary in length). The base shape of a regular pyramid is a regular polygon (A 2D shape with straight equal sides).Īll the lateral edges (edges leading from the base to the apex) are equal in length.
It has triangular side faces which slope to meet each other at the apex. A pyramid is a polyhedron that has a flat polygonal base and an apex.
