有关坐标
coordinate system 坐标系 rectangular coordinate 直角坐标系 origin
原点
abscissa 横坐标
ordinate
纵坐标
number line 数轴
quadrant 象限
slope 斜率
complex plane 复平面
8.其它
plane geometry 平面几何 trigonometry 三角学 bisect 平分
circumscribe 外切 inscribe 内切 intersect 相交
perpendicular 垂直pythagorean theorem 勾股定理
congruent 全等的multilateral 多边的
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