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贵刊2010年第11期刊登了《活用法向量巧解几何题》一文(简称文[1]),该文使用坐标向量法灵活利用平面的法向量解决了立体几何题中所有涉及面的问题.正如作者所言:“法向量的应用主要是将形转化为数,法向量的计算过程中涉及很多数的运算.因此,当我们建好空间直角坐标系后一定要准确、快速地求出点的坐标、向量和法向量的坐标.在繁琐的运算中我们要做到细心、准确、迅速.”从中可以看出关键的两点:一是正确恰当的建系,二是准确迅速的计
In the 11th issue of your journal of 2010, we published a text entitled “Living Usage Vector Solving Geometry Problems” (abbreviated as [1]). This paper uses the coordinate vector method to flexibly solve all the problems involved in the surface As the author put it: “The application of normal vectors is mainly to transform the shape into a number, the calculation of the normal vector involves a large number of operations. Therefore, when we build a rectangular Cartesian coordinate system must be accurately and quickly calculated Point coordinate, vector and normal vector coordinates in the cumbersome computing we have to be careful, accurate and rapid. ”It can be seen from the key to two points: First, the correct and appropriate building system, the second is accurate and rapid meter