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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 Pons asinorum ： ウィキペディア英語版 Pons asinorum In geometry, the statement that the angles opposite the equal sides of an isosceles triangle are themselves equal is known as the ''pons asinorum'' (/ /; ), Latin for "bridge of donkeys". This statement is Proposition 5 of Book 1 in Euclid's ''Elements'', and is also known as the isosceles triangle theorem. Its converse is also true: if two angles of a triangle are equal, then the sides opposite them are also equal. The name of this statement is also used metaphorically for a problem or challenge which will separate the sure of mind from the simple, the fleet thinker from the slow, the determined from the dallier; to represent a critical test of ability or understanding.〔(Pons asinorum - Definition and More from the Free Merriam )〕 == Proofs == 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「Pons asinorum」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.