This rose that features fivefold symmetry for a more natural appearance. The golden ratio is replete in many natural plant forms and the rose is no exception. The method for developing the pentagon is approximate but very accurate. The center of the pentagon is at the center of the paper.

Half Tetrahedron
*2002*

Another pentahedron, the faces of this solid include a square, two equilateral triangles, and two trapezoids whose long edge is twice as long as the other three edges. It has the interesting property of being able to form a tetrahedron when joined to another of the same shape by the square face.

Another pentahedron, the faces of this solid include a square, two equilateral triangles, and two trapezoids whose long edge is twice as long as the other three edges. It has the interesting property of being able to form a tetrahedron when joined to another of the same shape by the square face.