Examples of using Regular polyhedra in English and their translations into Russian
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It is one of four nonconvex regular polyhedra.
The most famous regular polyhedra are the five Platonic solids.
Only the icosahedron andthe great icosahedron are also regular polyhedra.
In three dimensions, there are 5 regular polyhedra known as the Platonic solids.
In Proposition 18 he argues that there are no further convex regular polyhedra.
For regular polyhedra, this is a special case of the Dorman Luke construction.
The stars and planets are the complicated objects- monads,the poles of which are at the regular polyhedra vertices.
Schematic" or"arithmetic" point of view for regular polyhedra and regular configurations of all kinds.
The protons on the nucleus surface tend to be uniformly distributed over it, andthey can come into the regular polyhedra vertices.
In the film we see the five regular polyhedra pass through the plane, and we can watch the sections/polygons as they deform.
Johannes Kepler's Mysterium Cosmographicum envisioned a cosmological system formed by concentric regular polyhedra and spheres.
They are edge-transitive andhence a step closer to regular polyhedra than the semiregular which are merely vertex-transitive.
In any case, Theaetetus gave a mathematical description of all five and may have been responsible for the first known proof that no other convex regular polyhedra exist.
The remaining convex regular polyhedra have an odd number of faces at each vertex so cannot be colored in a way that preserves edge transitivity.
Coxeter looked at skew vertex figures which created new 4-dimensional regular polyhedra, and much later Branko Grünbaum looked at regular skew faces.
A convex 4-polytope is semi-regular if it has a symmetry group under which all vertices are equivalent(vertex-transitive) andits cells are regular polyhedra.
Whereas Plato discussed the regular polyhedra in ordinary 3 dimensional space, Schäfli described the regular polyhedrons in dimension 4.
To learn more about polyhedra, you can consult this page, andto learn much more about the five regular polyhedra, their history and their symmetries, you can consult this page.
All regular polyhedra have circumscribed spheres, but most irregular polyhedra do not have one, since in general not all vertices lie on a common sphere.
They are characterized by an extremely broad host spectrum ranging from plants to insects and mammals; human-infecting viruses more commonly have icosahedral symmetry andtake shapes approximating regular polyhedra.
This means that its cells are all congruent regular polyhedra, and similarly its vertex figures are congruent and of another kind of regular polyhedron. .
Five such regular abstract polyhedra, which can not be realised faithfully, were identified by H. S. M. Coxeter inhis book Regular Polytopes(1977) and again by J. M. Wills in his paper"The combinatorially regular polyhedra of index 2" 1987.
Circles, regular polygons and regular polyhedra, and spheres may be concentric to one another(sharing the same center point), as may cylinders sharing the same central axis.
A hemi-dodecahedron is an abstract regular polyhedron, containing half the faces of a regular dodecahedron.
The fifth possible regular polyhedron- dodecahedron, is the fifth element, which Logos used to create the heavenly bodies.
The centroid of many figures(regular polygon, regular polyhedron, cylinder, rectangle, rhombus, circle, sphere, ellipse, ellipsoid, superellipse, superellipsoid, etc.) can be determined by this principle alone.
In particular, they were able to obtain data on the internal structure of the particles,confirming that the basis of its structure is a distorted icosahedron- a regular polyhedron with twenty triangular faces.
The next main objects are the only five possible convex regular polyhedrons or the Platonic solids.
The higher number of balls cannot provide the extremely dense and uniform arrangement in a spherical surface andvolume, because the convex regular polyhedrons with a higher number of the triangular faces don't exist.
As such, it is topologically a regular polyhedron of index two: The colours in the above image correspond to the red pentagrams and yellow pentagons of the dodecadodecahedron at the top of this article.