In Euclidean geometry, a **parallelepiped** is a three-dimensional figure (a polyhedron) having six sides (a hexahedron or prism). All six sides are parallelograms. Opposing sides are parallel and therefore all opposing sides are also congruent.

Given a parallelepiped whose edges are formed by the vectors , the volume of the parallelepiped is the scalar triple product of the three vectors:

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