逆ぎゃく三さん角かっ形けいMeaningsNoun1. inverted triangleOther readings逆ぎゃく三さん角かく形けいKanji used逆reverse三three角angle形shapeComposed of逆ぎゃくreverse; opposite; converse (of a hypothesis, etc.); inverse (function)No-adjective三さん角かっ形けいtriangleNoun