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In mathematics, a ball is the volume space bounded by a sphere; it is also called a solid sphere.[1] It may be a closed ball (including the boundary p
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Cube, in Euclidean geometry, a regular solid with six square faces; that is, a regular hexahedron.
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In geometry, a donut (plural tori, colloquially torus) is a surface of revolution generated by revolving a circle in three-dimensional space about an
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A gemstone (also called a gem, fine gem, jewel, precious stone, or semi-precious stone) is a piece of mineral crystal which, in cut and polished form,
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In geometry, a tetrahedron (plural: tetrahedra or tetrahedrons), also known as a triangular pyramid, is a polyhedron composed of four triangular faces