Showing posts with label how to find vertices. Show all posts
Showing posts with label how to find vertices. Show all posts

Tuesday, October 19, 2010

How to find vertices, edges and faces of a prism given the sides or base?

1) To find the number of vertices, edges and faces of any prism given the number of sides (or) base, use this formula:

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