- In geometry, an
icosahedron (/ˌaɪkɒsəˈhiːdrən, -kə-, -koʊ-/ or /aɪˌkɒsəˈhiːdrən/) is a
polyhedron with 20 faces. The name
comes from
Ancient Gr**** εἴκοσι...
- In geometry, the
regular icosahedron (or
simply icosahedron) is a
convex polyhedron that can be
constructed from
pentagonal antiprism by
attaching two...
- In geometry, the
truncated icosahedron is a
polyhedron that can be
constructed by
truncating all of the
regular icosahedron's vertices. Intuitively, it...
- In geometry, the
great icosahedron is one of four Kepler–Poinsot
polyhedra (nonconvex
regular polyhedra), with Schläfli
symbol {3,5⁄2} and Coxeter-Dynkin...
- In geometry, the
triakis icosahedron is an
Archimedean dual solid, or a
Catalan solid, with 60
isosceles triangle faces. Its dual is the
truncated dodecahedron...
- In geometry, the
metabidiminished icosahedron is one of the
Johnson solids (J62). The name
refers to one way of
constructing it, by
removing two pentagonal...
- Jessen's
icosahedron,
sometimes called Jessen's
orthogonal icosahedron, is a non-convex
polyhedron with the same
numbers of vertices, edges, and faces...
- cube, and
dodecahedron and that the
discovery of the
octahedron and
icosahedron belong to Theaetetus, a
contemporary of Plato. In any case, Theaetetus...
- It
enumerates certain stellations of the
regular convex or
Platonic icosahedron,
according to a set of
rules put
forward by J. C. P. Miller.
First published...
-
icosahedron is the
outermost stellation of the
icosahedron, and is "complete" and "final"
because it
includes all of the
cells in the
icosahedron's stellation...
