Types of Pyramids
The base of a regular pyramid is a regular polygon and its faces are equally sized triangles.
The base of an irregular pyramid is an irregular polygon, and as a result, its faces are not equally sized.
A convex pyramid has a convex polygon as its base.
A concave pyramid has a concave polygon as its base.
A right pyramid has isosceles triangles as its faces and its apex lies directly above the midpoint of the base.
An oblique pyramid does not have all isosceles triangles as its lateral sides.
Types of Pyramids by their Base
The base is a triangle.
The base is a square.
The base is a pentagon.
The base is a hexagon.