...For four numbers a , b , c , and d , if a : b = c : d , then a , b , c , and d are said to be proportional, and a : b = c : d is called a proportional equation, or a proportion. a and d are called the exterior terms of the proportional equation, and b and c are called the interior terms. Also, for three numbers a , b , and c , if a : b = b : c , then b is said to be the mean proportional term of a and c . *Some of the terminology explanations that refer to "Ionic columns" are listed below. Source | Heibonsha World Encyclopedia 2nd Edition | Information |
…四つの数a,b,c,dについて,a:b=c:dであるとき,a,b,c,dは比例をなしているといい,a:b=c:dを比例式,または比例という。a,dを比例式の外項,b,cを内項と呼ぶ。また,三つの数a,b,cについて,a:b=b:cであるとき,bはa,cの比例中項であるという。 ※「イオニア式円柱」について言及している用語解説の一部を掲載しています。 出典|株式会社平凡社世界大百科事典 第2版について | 情報 |
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