Frustum of a Regular Pyramid Formulae

The Frustum of a Regular Pyramid is formed when the top portion with the apex of the pyramid is cut-off. The remaining geometrical figure formed after chopping off the pyramid is called a frustum. The frustum so formed has 2 bases, one being the actual flat base of the pyramid and the other flat base which gets formed when the top portion of the pyramid is separated out. 

They are denoted by ‘b₁‘ and ‘b₂‘. The perpendicular distance between the flat top-base of the frustum and the flat bottom-base of the frustum is called height and is denoted by ‘h’. Likewise, the slant height between the two bases of the frustum is denoted by ‘s’. The lateral surface area and volume of the frustum can be calculated after knowing the values of areas of two bases and height for the volume of the frustum and the values of the perimeter of the two bases and slant height for finding the lateral surface of the surface. We will see how both can be calculated by a simple formula.

Check: Lateral Area Formula

A Pyramid is a Mathematical figure having three or four triangular faces as sides and a flat polygonal base which can be triangular, square or rectangular, etc. The side triangular faces are called Lateral faces. The common meeting point of all the triangular faces is called the apex. For a given pyramid having a base with ‘b’ sides has ‘2b’ edges and ‘b + 1’ faces and vertices.