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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 Bicentric polygon ： ウィキペディア英語版 Bicentric polygon In geometry, a bicentric polygon is a tangential polygon (a polygon all of whose sides are tangent to an inner incircle) which is also cyclic — that is, inscribed in an outer circle that passes through each vertex of the polygon. All triangles and all regular polygons are bicentric. On the other hand, a rectangle with unequal sides is not bicentric, because no circle can be tangent to all four sides. ==Triangles== (詳細はincircle and circumcircle respectively are related by the equation :$\backslash frac+\backslash frac=\backslash frac$ where ''x'' is the distance between the centers of the circles.〔.〕 This is one version of Euler's triangle formula. 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「Bicentric polygon」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.