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翻訳と辞書　辞書検索 [ 開発暫定版 ] スポンサード リンク Compound of eight octahedra with rotational freedom ： ウィキペディア英語版 Compound of eight octahedra with rotational freedom This uniform polyhedron compound is a symmetric arrangement of 8 octahedra, considered as triangular antiprisms. It can be constructed by superimposing eight identical octahedra, and then rotating them in pairs about the four axes that pass through the centres of two opposite octahedral faces. Each octahedron is rotated by an equal (and opposite, within a pair) angle θ. When θ = 0, all eight octahedra coincide. When θ is 60 degrees, the octahedra coincide in pairs yielding (two superimposed copies of) the compound of four octahedra. == Cartesian coordinates == Cartesian coordinates for the vertices of this compound are all the permutations of : (±(1 − cosθ + (√3) sin θ), ±(1 − cosθ − (√3)sinθ), ±(1 + 2 cos θ)) 抄文引用元・出典: フリー百科事典『 ウィキペディア（Wikipedia）』 ■ウィキペディアで「Compound of eight octahedra with rotational freedom」の詳細全文を読む スポンサード リンク 翻訳と辞書 : 翻訳のためのインターネットリソース Copyright(C) kotoba.ne.jp 1997-2016. All Rights Reserved.