正三角形 zhèngsānjiǎoxíng equilateral triangle Origin Definitions Defs Strokes Stroke Words Sentences Sents 正 zhèng noun straight straight; upright; not tilted; also used to describe shapes with equal sides and angles, such as a regular hexagon三角形 sānjiǎoxíng noun triangle three-sided shape in geometry; also describes things with a similar shape, such as a delta