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一、正确建立空间直角坐标系确定点的坐标用空间向量的方法研究空间图形的性质,是中学立体几何课程的一项重要改革,建立空间直角坐标系研究空间图形,要从图形的实际出发、合理选择坐标轴,以使点、线的表示简化,运算简明快捷。选坐标轴应充分利用所给空间图形
First, the correct establishment of space rectangular coordinate system to determine the coordinates of the point using space vector method to study the nature of spatial graphics, is an important reform of the middle school of three-dimensional geometry course, the establishment of space rectangular coordinate system to study the spatial graphics, starting from the actual graphics, Reasonably select coordinate axes to simplify the representation of points and lines, and the operation is concise and quick. Select axes should make full use of space graphics