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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 Heron’s formula ： ウィキペディア英語版 Heron's formula In geometry, Heron's formula (sometimes called Hero's formula), named after Hero of Alexandria,〔(【引用サイトリンク】url=http://recursostic.educacion.es/descartes/web/materiales_didacticos/formula_heron/formula_de_Heron.htm )〕 gives the area of a triangle by requiring no arbitrary choice of side as base or vertex as origin, contrary to other formulas for the area of a triangle, such as half the base times the height or half the norm of a cross product of two sides. ==Formulation== Heron's formula states that the area of a triangle whose sides have lengths ''a'', ''b'', and ''c'' is :$A\; =\; \backslash sqrt,$ where ''s'' is the semiperimeter of the triangle; that is, :$s=\backslash frac.$ Heron's formula can also be written as :$A=\backslash frac\backslash sqrt$ :$A=\backslash frac\backslash sqrt$ :$A=\backslash frac\backslash sqrt$ :$A=\backslash frac\backslash sqrt.$ 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「Heron's formula」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.