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Parallelepiped
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<table><tbody><tr><th colspan="2">Parallelepiped</th></tr><tr><td colspan="2"></td></tr><tr><td>Type</td><td><a href="/facts/Prism_(geometry)/baIRRkCy">Prism</a><a href="/facts/Plesiohedron/Lytb02ys">Plesiohedron</a></td></tr><tr><td>Faces</td><td>6 <a href="/facts/Parallelogram/DRuktq60">parallelograms</a></td></tr><tr><td>Edges</td><td>12</td></tr><tr><td>Vertices</td><td>8</td></tr><tr><td><a href="/facts/List_of_spherical_symmetry_groups/3X3YcHoQ">Symmetry group</a></td><td><a href="/facts/Point_reflection/UzswAm8N"><i>C</i><i>i</i></a>, [2+,2+], (×), order 2</td></tr><tr><td>Properties</td><td>convex, <a href="/facts/Zonohedron/w16kH9H3">zonohedron</a></td></tr></tbody></table> <p>In <a href="/facts/Geometry/wTQf5ffQ">geometry</a>, a parallelepiped is a <a href="/facts/Three-dimensional_figure/tHH3JFoq">three-dimensional figure</a> formed by six <a href="/facts/Parallelogram/DRuktq60">parallelograms</a> (the term <i><a href="/facts/Rhomboid/Y1TDBFgE">rhomboid</a></i> is also sometimes used with this meaning). By analogy, it relates to a <a href="/facts/Parallelogram/DRuktq60">parallelogram</a> just as a <a href="/facts/Cube/65lUaAqN">cube</a> relates to a <a href="/facts/Square/JHJeMvmL">square</a>. </p><p>Three equivalent definitions of <i>parallelepiped</i> are </p> <ul><li>a <a href="/facts/Hexahedron/UzruYxzd">hexahedron</a> with three pairs of parallel faces,</li> <li>a <a href="/facts/Polyhedron/UC0p9FTF">polyhedron</a> with six faces (<a href="/facts/Hexahedron/UzruYxzd">hexahedron</a>), each of which is a parallelogram, and</li> <li>a <a href="/facts/Prism_(geometry)/baIRRkCy">prism</a> of which the base is a <a href="/facts/Parallelogram/DRuktq60">parallelogram</a>.</li></ul> <p>The <a href="/facts/Rectangular_cuboid/eLLKX4rh">rectangular cuboid</a> (six <a href="/facts/Rectangular/mdLfIGKA">rectangular</a> faces), <a href="/facts/Cube/65lUaAqN">cube</a> (six <a href="/facts/Square/JHJeMvmL">square</a> faces), and the <a href="/facts/Rhombohedron/S7XSr6Yu">rhombohedron</a> (six <a href="/facts/Rhombus/T4pU50GF">rhombus</a> faces) are all special cases of parallelepiped. </p><p>"Parallelepiped" is now usually pronounced /ˌpærəˌlɛlɪˈpɪpɪd/ or /ˌpærəˌlɛlɪˈpaɪpɪd/; traditionally it was /ˌpærəlɛlˈɛpɪpɛd/ PARR-ə-lel-EP-ih-ped because of its etymology in <a href="/facts/Ancient_Greek/LIK7NlUh">Greek</a> παραλληλεπίπεδον <i>parallelepipedon</i> (with short -i-), a body "having <a href="/facts/Parallel_planes/16r5yq7D">parallel planes</a>". </p><p>Parallelepipeds are a subclass of the <a href="/facts/Prismatoid/lPBxnDeG">prismatoids</a>. </p>