3-D Cube :
In geometry, a cube is a three-dimensional solid object surrounded by six square faces or sides that all meet each vertex. The cube is also called a regular hexahedron and is one of the five platonic solids.
The cube is a special type of square prism, which is of rectangular parallel quadrilateral and trigonal trapezoidron. The cube is dual to the octahedron. It has cubical symmetry which is also known as octahedral symmetry.
A cube is a three-dimensional case of the more general concept of a hypercube. It has 11 nets. If one has to color the cube, so that none of the adjacent faces have the same color, one would need 3 colors. If the original cube has an edge length of 1, its double octahedron has an edge length √2