三角学 sānjiǎoxué trigonometry Origin Definitions Defs Strokes Stroke Words Sentences Sents 三角 sānjiǎo noun triangle a shape with three sides and three angles; an object in the shape of a triangle学 學 xué nounaffix branch of learning (bound form) a subject or branch of study; often used as a suffix for -logy, -ics, or -science