Triangular Prism
Initial Definition

A triangular prism is a prism with a triangular base and faces coresponding to each side of a base. The faces which are not bases are called lateral faces.


Triangular prism

Usually right triangular prisms (with rectangular lateral faces) are studied.


Right triangular prism

Volume and Surface Area of a Triangular Prism

In general, the volume of a triangular prism is the area of the base times the height of the prism.

In general, the surface area of a triangular prism is the sum of the areas of all of the faces of the prism.


Right Prism with a Triangular Base

b: A base of the triangular base of the prism

s1: One of the two remaining sides (not the designated base) of the triangular base of the prism

s2: The second of two remaining sides (not the designated base) of the triangular base of the prism

H: The height of the triangular base of the prism

h: The height of the prism


V: The volume of the interior of the prism

S: The surface area of the prism


Prism (volume and surface area)

Explanation of volume formula (triangular base)

Explanation of surface area formula (triangular base)