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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 Archimedean circle ： ウィキペディア英語版 Archimedean circle In geometry, an Archimedean circle is any circle constructed from an arbelos that has the same radius as each of Archimedes' twin circles. The radius ''ρ'' of such a circle is given by :$\backslash rho=\backslash fracr\backslash left(1-r\backslash right),$ where ''r'' is the ratio ''AB''/''AC'' shown in the figure to the right. There are over fifty different known ways to construct Archimedean circles.〔(【引用サイトリンク】 title=Online catalogue of Archimedean circles )〕 ==Origin== An Archimedean circle was first constructed by Archimedes in his ''Book of Lemmas''. In his book, he constructed what is now known as Archimedes' twin circles. 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「Archimedean circle」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.