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The compound of twenty octahedra with rotational freedom is a uniform polyhedron compound. It's composed of a symmetric arrangement of 20 octahedra, considered as triangular antiprisms. It can be constructed by superimposing two copies of the compound of 10 octahedra UC16, and for each resulting pair of octahedra, rotating each octahedron in the pair by an equal and opposite angle θ. When θ is zero or 60 degrees, the octahedra coincide in pairs yielding (two superimposed copies of) the compounds of ten octahedra UC16 and UC15 respectively. When

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  • Kombinaĵo de 20 okedroj kun turna libereco (eo)
  • Compound of twenty octahedra with rotational freedom (en)
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  • En geometrio, kombinaĵo de dudek okedroj kun turna libereco estas uniforma pluredra kombinaĵo, simetria ordigo de 20 okedroj, konsiderataj kiel triangulaj kontraŭprismoj. Ĝi povas esti konstruita per kunmeto de du kopioj de la kombinaĵo de 10 okedroj UC16, kaj por ĉiu rezultanta paro de okedroj, turno de ĉiu okedro en la paro per egala kaj kontraŭa angulo θ. (eo)
  • The compound of twenty octahedra with rotational freedom is a uniform polyhedron compound. It's composed of a symmetric arrangement of 20 octahedra, considered as triangular antiprisms. It can be constructed by superimposing two copies of the compound of 10 octahedra UC16, and for each resulting pair of octahedra, rotating each octahedron in the pair by an equal and opposite angle θ. When θ is zero or 60 degrees, the octahedra coincide in pairs yielding (two superimposed copies of) the compounds of ten octahedra UC16 and UC15 respectively. When (en)
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  • http://commons.wikimedia.org/wiki/Special:FilePath/UC13-20_octahedra.png
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  • En geometrio, kombinaĵo de dudek okedroj kun turna libereco estas uniforma pluredra kombinaĵo, simetria ordigo de 20 okedroj, konsiderataj kiel triangulaj kontraŭprismoj. Ĝi povas esti konstruita per kunmeto de du kopioj de la kombinaĵo de 10 okedroj UC16, kaj por ĉiu rezultanta paro de okedroj, turno de ĉiu okedro en la paro per egala kaj kontraŭa angulo θ. Se θ estas 0 aŭ 60 gradoj, la okedroj koincidas en paroj kaj rezultiĝas (du koincidantaj kopioj de) la kombinaĵo de 10 okedroj UC16 kaj UC15 respektive. Je certa intera angulo la verticoj koincidas en paroj, kaj rezultiĝas la kombinaĵo de 20 okedroj (sen turna libereco). (eo)
  • The compound of twenty octahedra with rotational freedom is a uniform polyhedron compound. It's composed of a symmetric arrangement of 20 octahedra, considered as triangular antiprisms. It can be constructed by superimposing two copies of the compound of 10 octahedra UC16, and for each resulting pair of octahedra, rotating each octahedron in the pair by an equal and opposite angle θ. When θ is zero or 60 degrees, the octahedra coincide in pairs yielding (two superimposed copies of) the compounds of ten octahedra UC16 and UC15 respectively. When octahedra (from distinct rotational axes) coincide in sets four, yielding the compound of five octahedra. When the vertices coincide in pairs, yielding the compound of twenty octahedra (without rotational freedom). (en)
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