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

S: The surface area of the prism

To determine the formula for the surface area of any prism, find the sum of the areas of every face.