こうこげん 勾股弦 LinksSentence search for 勾股弦Sentence search for こうこげんSentence search for 鈎股弦Kanji details for 勾, 股 and 弦Edit in JMdict Noun1. three sides of right triangle (minor cathetus, major cathetus and hypotenuse)Rare termOther forms鈎股弦 【こうこげん】 Discussions Log in to talk about this word.