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对于平面直角坐标系中的平行四边形(顶点字母顺序非给定)存在性问题,文[1]从“平行四边形对角线互相平分”的性质入手,以“哪条线段为对角线”作分类标准确定所求点的位置,并运用中点坐标公式求其坐标.读后受益匪浅,也深受启发,现介绍另一种处理策略,以供参考.1知识剖析1.1如何适当分类
For the existence of parallelograms (non-given vertex order) in the Cartesian coordinate system, the paper [1] starts with the property that the diagonals of parallelograms are bisectal to each other, and which line is diagonal Line "as the classification criteria to determine the location of the point, and use the coordinates of the coordinates of the coordinates of its coordinates. After reading a lot of benefits, but also inspired by the introduction of another treatment strategy for reference .1 Knowledge Analysis 1.1 How to classify properly