Приклади вживання Stellations Англійська мовою та їх переклад на Українською
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Naming stellations.
Stellations of octahedron.
Miller stellations.
Stellations of icosahedron.
Main-line stellations.
Stellations of dodecahedron.
Monoacral stellations.
Stellations of cuboctahedron.
Includes uniform polyhedra, stellations, compounds, Johnson solids, etc.
Stellations of icosidodecahedron.
Miller's rules by no means represent the"correct" way to enumerate stellations.
Stellations: models W19 to W66.
These rules have been adapted for use with stellations of many other polyhedra.
Many"Miller stellations" cannot be obtained directly by using Kepler's method.
By most definitions of a polyhedron, these stellations are not strictly polyhedra.
Wenninger noticed that some polyhedra, such as the cube, do not have any finite stellations.
A regular n-gon has(n-4)/2 stellations if n is even, and(n-3)/2 stellations if n is odd.
Adding successive shells to thecore polyhedron leads to the set of main-line stellations.
Primary stellations. Where a polyhedron has planes of mirror symmetry, edges falling in these planes are said to lie in primary lines.
Seventeen of the nonconvex uniform polyhedra are stellations of Archimedean solids.
Here we usually add the rule that all of the original face planes must be present in the stellation,i.e. we do not consider partial stellations.
Like the heptagon, the octagon also has two octagrammic stellations, one,{8/3} being a star polygon, and the other,{8/2}, being the compound of two squares.
Some polyhedronists take the view that stellation is a two-way process, such that any two polyhedrasharing the same face planes are stellations of each other.
There are 58 stellations of the icosahedron, including the great icosahedron(one of the Kepler-Poinsot polyhedra), and the second and final stellations of the icosahedron.
The polyhedra are grouped in 5 tables: Regular(1- 5), Semiregular(6- 18), regular star polyhedra(20-22,41), Stellations and compounds(19- 66), and uniform star polyhedra(67- 119).
As such there are some quite reasonable stellations of the icosahedron that are not part of their list- one was identified by James Bridge in 1974, while some"Miller stellations" are questionable as to whether they should be regarded as stellations at all- one of the icosahedral set comprises several quite disconnected cells floating symmetrically in space.
For example many have hollow centres where the original faces and edges of the core polyhedron are entirely missing: there is nothing left to be stellated. On the other hand,Kepler's method also yields stellations which are forbidden by Miller's rules since their cells are edge- or vertex-connected, even though their faces are single polygons.
Stellations of the rhombic dodecahedron 187 stellations of the triakis tetrahedron 358,833,097 stellations of the rhombic triacontahedron 17 stellations of the cuboctahedron(4 are shown in Wenninger's"Polyhedron Models") Unknown number of stellations of the icosidodecahedron; there are 7071671 non-chiral stellations, but the number of chiral stellations is unknown.(19 are shown in Wenninger's"Polyhedron Models").
There are no stellations of the tetrahedron, because all faces are adjacent There are no stellations of the cube, because non-adjacent faces are parallel and thus cannot be extended to meet in new edges There is 1 stellation of the octahedron, the stella octangula There are 3 stellations of the dodecahedron: the small stellated dodecahedron, the great dodecahedron and the great stellated dodecahedron, all of which are Kepler-Poinsot polyhedra.
Under Miller's rules we find: There are no stellations of the tetrahedron, because all faces are adjacent There are no stellations of the cube, because non-adjacent faces are parallel and thus cannot be extended to meet in new edges There is 1 stellation of the octahedron, the stella octangula There are 3 stellations of the dodecahedron: the small stellated dodecahedron, the great dodecahedron and the great stellated dodecahedron, all of which are Kepler- Poinsot polyhedra.