-
another sphere (the insphere)
tangent to the
tetrahedron's faces. A
regular tetrahedron is a
tetrahedron in
which all four
faces are
equilateral triangles...
-
truncating all 4
vertices of a
regular tetrahedron. The
truncated tetrahedron can be
constructed from a
regular tetrahedron by
cutting all of its vertices...
-
triangular pyramids onto the
triangular faces of a
regular tetrahedron, a
Kleetope of a
tetrahedron. This
replaces the
triangular faces with three, so...
- outermost:
regular octahedron,
regular icosahedron,
regular dodecahedron,
regular tetrahedron, and cube. Many
antiquity philosophers described the
regular dodecahedron...
-
Kepler discovered the
relationship between the cube,
regular tetrahedron and
trirectangular tetrahedron. Only the
bifurcating graph of the B 3 {\displaystyle...
- isotetrahedron, sphenoid, bisphenoid,
isosceles tetrahedron,
equifacial tetrahedron,
almost regular tetrahedron, and tetramonohedron. All the
solid angles...
- with a
regular solid.
Earth was ****ociated with the cube, air with the octahedron,
water with the icosahedron, and fire with the
tetrahedron. Of the...
- the outermost:
regular octahedron,
regular icosahedron,
regular dodecahedron,
regular tetrahedron, and cube. Like its dual, the
regular octahedron has...
- 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...
- four-dimensional
analogues of the
Platonic solids). A
regular 5-cell can be
constructed from a
regular tetrahedron by
adding a
fifth vertex one edge
length distant...
