勾股弦 こうこげん Also written 鈎股弦 Meanings Noun three sides of right triangle (minor cathetus, major cathetus and hypotenuse) Kanji 勾 hook. Read as コウ. 股 crotch 弦 string. Read as ゲン. Words containing 勾股弦 勾股弦の定理 (こうこげんのていり) Pythagorean theorem Jinuma: Japanese Dictionary · Word lists