- In geometry, a
trirectangular tetrahedron is a
tetrahedron where all
three face
angles at one
vertex are
right angles. That
vertex is
called the right...
-
three right angles and
three right sides. It is
sometimes called a
trirectangular (spherical) triangle. It is one face of a
spherical octahedron. For...
- geometry)
Octree Spherical octant, the
intersection of an
octant of
space and a
sphere Trirectangular tetrahedron Weisstein, Eric W. "Octant". MathWorld....
-
Acute and
obtuse triangles (oblique triangles)
Spiral of
Theodorus Trirectangular spherical triangle Di Domenico,
Angelo S., "A
property of triangles...
-
plane (e.g.,
spanned by the
three neighboring vertices),
resulting in a
trirectangular tetrahedron. The snub cube is an
Archimedean solid that can be constructed...
- are perpendicular, it is
called a semi-orthocentric tetrahedron. In a
trirectangular tetrahedron the
three face
angles at one
vertex are
right angles, as...
- octahedron's
eight faces, the six
orthoschemes collectively forming a
trirectangular tetrahedron: a
triangular pyramid with the
octahedron face as its equilateral...
- diagonals, and the body
diagonal are all integers. No
example of a
Heronian trirectangular tetrahedron had been
found and no one has
proven that none exist. A...
-
Johnson solid with 12
equilateral triangle faces and D2d symmetry.
Trirectangular tetrahedron Coxeter, H. S. M. (1973),
Regular Polytopes (3rd ed.), Dover...
- ( a + b + c ) {\displaystyle s={\tfrac {1}{2}}(a+b+c)} .
Disphenoid Trirectangular tetrahedron Court, N. A. (October 1934), "Notes on the orthocentric...
