- the
tetrahedron's faces. A
regular tetrahedron is a
tetrahedron in
which all four
faces are
equilateral triangles. It is one of the five
regular Platonic...
- A
regular dodecahedron or
pentagonal dodecahedron is a
dodecahedron that is
regular,
which is
composed of 12
regular pentagonal faces,
three meeting at...
- the two
forms a
regular octahedron. The
symmetries of a
regular tetrahedron correspond to
those of a cube
which map each
tetrahedron to itself; the other...
- In geometry, the
truncated tetrahedron is an
Archimedean solid. It has 4
regular hexagonal faces, 4
equilateral triangle faces, 12
vertices and 18 edges...
- stellation. Correspondingly, a
regular octahedron is the
result of
cutting off from a
regular tetrahedron, four
regular tetrahedra of half the
linear size...
- the
faces of the other, and vice versa. The
regular polyhedra show this
duality as follows: The
tetrahedron is self-dual, i.e. it
pairs with itself. The...
- The
Reuleaux tetrahedron is the
intersection of four
balls of
radius s
centered at the
vertices of a
regular tetrahedron with side
length s. The spherical...
- isotetrahedron, sphenoid, bisphenoid,
isosceles tetrahedron,
equifacial tetrahedron,
almost regular tetrahedron, and tetramonohedron. All the
solid angles...
-
simplexes or simplices) is a
generalization of the
notion of a
triangle or
tetrahedron to
arbitrary dimensions. The
simplex is so-named
because it represents...
-
composed of
equilateral triangles: the
tetrahedron,
octahedron and icosahedron.: p.238 In particular, the
tetrahedron,
which has four
equilateral triangles...