Platonic solid is a regular, convex polyhedron in three-dimensional space. It is constucted by congruent regular polygonal faces with the same number of faces meeting at each vertex. Only five solid which are tetrahedron, cube, octahedron, dodecahedron, icosahedron meet those criteria. In a theory of greek philosopher, Plato, each solid represent one of classic elements which are earth, air, water and fire. This work present the cube which means earth in the classical theory.
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