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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 Triakis icosahedron ： ウィキペディア英語版 Triakis icosahedron In geometry, the triakis icosahedron (or kisicosahedron〔Conway, Symmetries of things, p.284〕) is an Archimedean dual solid, or a Catalan solid. Its dual is the truncated dodecahedron. ==Orthogonal projections== The triakis icosahedron has three symmetry positions, two on vertices, and one on a midedge: The Triakis icosahedron has five special orthogonal projections, centered, on a vertex, on two types of edges, and two types of faces: hexagonal and pentagonal. The last two correspond to the A2 and H2 Coxeter planes. 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「Triakis icosahedron」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.