a) vertices of a prism = 2n

b) edges of a prism = 3n

c) faces of a prism = n + 2

where n is the number of sides of a prism

Examples:

Find the number of vertices, edges and faces of a hexagonal prism.

We know that a hexagon has 6 sides (n), therefore

vertices = 2n ==> 2 * 6 = 12

edges = 3n ==> 3 * 6 = 18

faces = n + 2 ==> 6 + 2 = 8