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A parellelepiped (pronounced parellel pie ped) is any shape with 6 faces and 12 edges.
A cuboid, also called a rectangular parallelepiped, is a parallelepiped of which all faces are rectangular.
A cube is a cuboid with square faces.
A rhombohedron is a parallelepiped with all rhombic faces.
A trigonal trapezohedron is a rhombohedron with congruent rhombic faces.
http://commons.wikimedia.org/wiki/File:Parallelepipede.png
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What is an irregular polyhedron?
An irregular polyhedron is a solid shape in which either all edges are not the same length, or all faces are not congruent polygons or all [solid] angles are not of the same measure.
What 3D shape has six faces and all the faces are congruent?
A cube satisfies that description.
Are all the faces of a prism congruent?
yes there are congruent because of the shape * * * * * Wrong. The faces may me congruent but don't have to be. Think of a brick (a rectangular prism). Its top and side are certainly not congruent. And there is no requirement, in such a prism, for the top and bottom to be congruent either.
What is the relationship between vertices faces and edges of a 3D shape?
they connect the shape together It all belongs to one shape
Is a sphere a prism?
No, a sphere is not a prism. A prism is a polyhedron with two parallel and congruent faces called bases, and all other faces are parallelograms. A sphere, on the other hand, is a three-dimensional geometric shape with all points on its surface equidistant from its center, with no faces, edges, or vertices. In essence, a sphere is a curved surface while a prism is a polyhedron with flat faces.
