直角三角形 ちょっかくさんかっけい Also written ちょっかくさんかくけい Meanings Noun right triangle; right-angled triangle Kanji 直 straight. Read as チョク. 角 angle. Read as カク. 三 three. Read as サン. 形 shape. Read as ケイ. Word lists Geometry Jinuma: Japanese Dictionary · Word lists