欧式几何学 ōushìjǐhéxué Euclidean geometry Origin Definitions Defs Strokes Stroke Words Sentences Sents 欧式 歐式 ōushì Euclidean referring to the Greek mathematician Euclid or his geometry几何学 幾何學 jǐhéxué geometry the branch of mathematics that studies the shape, size, and position of figures and the properties of space; also called 几何 jǐhé