- In geometry, the
regular icosahedron (or
simply icosahedron) is a
convex polyhedron that can be
constructed from
pentagonal antiprism by
attaching two...
- "
regular icosahedron"
generally refers to the
convex variety,
while the
nonconvex form is
called a
great icosahedron. The
convex regular icosahedron is...
- (Smith, 1982, p212), of
which there are 48.
Neither the
regular icosahedron nor the
regular dodecahedron are
amongst them, but
crystals can have the...
- them is the
regular icosahedron as its dual polyhedron.
Other new
polyhedrons can be
constructed by
using regular dodecahedron. The
regular dodecahedron's...
- In geometry, the
truncated icosahedron is a
polyhedron that can be
constructed by
truncating all of the
regular icosahedron's vertices. Intuitively, it...
- water, and fire) with a
regular solid.
Earth was ****ociated with the cube, air with the octahedron,
water with the
icosahedron, and fire with the tetrahedron...
- In geometry, the
great icosahedron is one of four Kepler–Poinsot
polyhedra (nonconvex
regular polyhedra), with Schläfli
symbol {3,5⁄2} and Coxeter-Dynkin...
-
tridiminished icosahedron is a
Johnson solid that is
constructed by
removing three pentagonal pyramids from a
regular icosahedron. The
tridiminished icosahedron can...
-
icosahedron can be
formed by
gluing triangular pyramids to each face of a
regular icosahedron.
Depending on the
height of
these pyramids relative to
their base...
-
polyhedron with the same
numbers of vertices, edges, and
faces as the
regular icosahedron. It is
named for Børge Jessen, who
studied it in 1967. In 1971, a...
