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Prismatic surface : ウィキペディア英語版 | Prismatic surface thumb A prismatic surface is a surface generated by all the lines that are parallel to a given line and intersect a broken line that is not in the same plane as the given line. The broken line is the ''directrix'' of the surface; the parallel lines are its ''generators'' (or ''elements''). If the broken line is closed (i.e., a closed polygon), then the surface is a ''closed prismatic surface''. With regards to crystallography, a prismatic surface is a single face of a prismatic form, which is an open form consisting of three, four, or six identical faces related by a symmetry operator. ==See also==
*Prism
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「Prismatic surface」の詳細全文を読む
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