鈍どん角かく三さん角かく形けいMeaningsNoun1. obtuse triangleKanji used鈍dull角angle三three形shapePitch accentどんかくさんかくけいComposed of鈍どんdull; slow; stupid; dull-brainedNa-adjective角かくangle; square; cube; bishop; third degree (of the Japanese and Chinese pentatonic scale); Chinese "horn" constellation (one of the 28 mansions); jiao (monetary unit of China; one-tenth of a yuan)Noun三さん角かく形けいtriangleNoun