Definition:Parallelepiped/Opposite Face

Definition

 * Parallelepiped.png

The opposite face of the face $F$ of a parallelepiped $P$ is the face of $P$ which is parallel to $F$.

In the above example, the pairs of parallel planes are:


 * Face $ABCD$ is opposite $HGFE$
 * Face $ADEH$ is opposite $BCFG$
 * Face $ABGH$ is opposite $DCFE$

Also known as
The opposite face can also be referred to as the opposite plane.

Historical Note
The term opposite face is never actually defined by, although he refers to the concept throughout: