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polyhedron

In geometry, a Polyhedron is a ThreeDimensionalFigure with flat polygonal faces, straight edges and sharp corners or vertices.[Wikipedia]

Relationships
Parents	three dimensional figure	The class of GeometricFigures that have position and an extension along three dimensions, viz. geometric solids like polyhedrons and cylinders.
Instances	cube	In geometry, a Cube or regular hexahedron is a three-dimensional solid object bounded by six congruent square faces, a type of polyhedron. It has twelve congruent edges and eight vertices. It is a type of parallelepiped, with pairs of parallel opposite faces, and more specifically a rhombohedron, with congruent edges, and a rectangular cuboid, with right angles between pairs of intersecting faces and pairs of intersecting edges.[Wikipedia]
	pyramid	In geometry, a Pyramid is a Polyhedron formed by connecting a polygonal base and a point, called the apex. Each base edge and apex form a triangle, called a lateral face. A pyramid is a conic solid with a polygonal base.[Wikipedia]

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