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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 Tetrahedron in Bottrop ： ウィキペディア英語版 Tetrahedron in Bottrop The Tetrahedron in Bottrop (German: ''Bottrop Tetraeder'' or officially ''Haldenereignis Emscherblick'') is a walkable steel structure in the form of a tetrahedron with a side length of 60m, resting on four 9m tall concrete pillars. It is located in Bottrop, Germany, on top of the mine dump ''Halde Beckstraße'' and serves as the town's landmark. It was opened on German Unity Day 3 October 1995. The design is reminiscent of the Sierpinski tetrix: placing four half-size tetrahedra corner to corner and adding an octahedron in the middle, a full-size tetrahedron is formed; this process can be repeated recursively to form larger and larger tetrahedra. 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「Tetrahedron in Bottrop」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.