Definition:Parallelepiped/Base

Definition
Consider a parallelepiped:


 * Parallelepiped.png

One of the faces of the parallelepiped is chosen arbitrarily, distinguished from the others and called a base of the parallelepiped.

The opposite face to that face is also referred to as one of the bases.

It is usual to choose one of the bases to be the one which is conceptually on the bottom.

In the above, $ABCD$ and $EFGH$ would conventionally be identified as being the bases.