- ἕδρα (hédra) 'seat'. The
plural can be
either "icosahedra" (/-drə/) or "
icosahedrons".
There are
infinitely many non-similar
shapes of icosahedra, some of...
- In geometry, the
truncated icosahedron is a
polyhedron that can be
constructed by
truncating all of the
regular icosahedron's vertices. Intuitively, it...
-
Regular icosahedrons can be
found in nature; a well-known
example is the
capsid in biology.
Other applications of the
regular icosahedron are the usage...
-
Complete icosahedron may
refer to: an
icosahedron which has had none of its
faces removed, as
opposed to a
partial icosahedron such as a
geodesic hemisphere...
- its side and thus
appears in the
construction of the
dodecahedron and
icosahedron. A
golden rectangle—that is, a
rectangle with an
aspect ratio of φ...
-
alternative name is
diminished icosahedron because it can be
constructed by
removing a
pentagonal pyramid from a
regular icosahedron. The
gyroelongated pentagonal...
- 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...
- 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...
- 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...
