Enneadecahedron
A enneadecahedron (or enneakaidecahedron) is a polyhedron with 19 faces. No enneadecahedron is regular; hence, the name is ambiguous.
Octadecagonal (18-sided) pyramid
3D model of 18-sided pyramid
Heptadecagonal (17-sided) prism
There are numerous topologically distinct forms of an enneadecahedron, for example the octadecagonal (18-sided) pyramid, or the heptadecagonal (17-sided) prism; the latter is the only convex enneadecahedron with all regular polygonal faces.
Convex enneadecahedra
There are many topologically distinct convex enneadecahedra, excluding mirror images, having at least 12 vertices.[1] (Two polyhedra are "topologically distinct" if they have intrinsically different arrangements of faces and vertices, such that it is impossible to distort one into the other simply by changing the lengths of edges or the angles between edges or faces.)
gollark: Brackets?
gollark: What would you have instead?
gollark: `function`/`end`/`then` and stuff *are* necessary to make Lua's syntax work, though admittedly it could be totally redone without that.
gollark: Why? Watching a movie?
gollark: ... well, possibly, but it doesn't affect the *line count*.
References
This article is issued from Wikipedia. The text is licensed under Creative Commons - Attribution - Sharealike. Additional terms may apply for the media files.