The solids are the tetrahedron, a four-sided pyramid-shaped solid; the six-sided cube; the eight-sided polyhedron; the 12-sided dodecahedron; and the 20-sided icosohedron.

From ancient times, mathematicians have been intrigued by polyhedra, closed surfaces with polygons as sides. The polyhedra shown here can be subdivided (dissected) into smaller polyhedra. Sometimes ...