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Parallelepiped
Lecture
A parallelepiped is called a prism, at the base of which is a parallelogram. A parallelepiped is called direct if its side edges are perpendicular to the bases. A parallelepiped is called oblique if its side edges are not perpendicular to the bases. The edges of the parallelepiped that do not have common vertices are called opposite .
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Stereometry
Terms: Stereometry