勾股弦の定理 こうこげんのていり Also written 鈎股弦の定理 Meanings Noun Pythagorean theorem See also: ピタゴラスの定理 (ピタゴラスのていり). Kanji 勾 hook. Read as コウ. 股 crotch 弦 string. Read as ゲン. 定 fix. Read as テイ. 理 reason. Read as リ. Jinuma: Japanese Dictionary · Word lists