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Salinon
The salinon (meaning "salt-cellar" in Greek) is a geometrical figure that consists of four semicircles. It was first introduced in the ''Book of Lemmas'', a work attributed to Archimedes.〔 〕 ==Construction== Let ''O'' be the origin on a Cartesian plane. Let ''A'', ''D'', ''E'', and ''B'' be four points on a line, in that order, with ''O'' bisecting line ''AB''. Let ''AD'' = ''EB''. Semicircles are drawn above line ''AB'' with diameters ''AB'', ''AD'', and ''EB'', and another semicircle is drawn below with diameter ''DE''. A salinon is the figure bounded by these four semicircles.〔 〕
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「Salinon」の詳細全文を読む
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