"The rays are sometimes very short, or altogether wanting, the body having the form of a pentagonal…

Represents a combination of a pentagonal dodecahedron and cube, and are common in pyrites.

"...resembles in general appearance the regular icosahedron of geometry, but only eight f the faces…

Represents the combination of pentagonal dodecahedron, cube, and octahedron.

Represents the combination of pentagonal dodcahedron, dyakis-dodecahedron and octahedron.

Right circular cylinder inscribed in a pentagonal prism. Or, Pentagonal prism circumscribed about a…

A flashcard featuring an illustration of a Pyramid with a Pentagonal Base

"This is bounded by twelve pentagonal faces, but these are not regular pentagons, and the angles over…

"This is the only simple form in this class which differs geometricalled from those of the holosymmetric…

Illustration of a right pentagonal prism with regular pentagons for bases and rectangular faces. The…

Illustration of a right pentagonal prism with regular pentagons for bases and rectangular faces. The…

Illustration of a right pentagonal prism with regular pentagons for bases and rectangular faces. The…

The frustum of a pentagonal pyramid is the portion of a pyramid included between the base and a section…

"This is bounded by twelve irregular pentagons, and is a tetartohedral or quarter-faced for of the hexakis-octahedron."…