\begin{definition}[Definition:Parallelepiped/Base]
Consider a parallelepiped:
:500px
One of the faces of the parallelepiped is chosen arbitrarily, distinguished from the others and called the '''base of the parallelepiped'''.
It is usual to choose the '''base''' to be the one which is conceptually on the bottom.
In the above, $ABCD$ would conventionally be identified as being the '''base'''
Category:Definitions/Parallelepipeds
\end{definition}