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读了《中小学数学》初中版2014年第12期刊登的相会静老师的《平行四边形存在性问题探究》及王祺光老师的《随意“画”轻松“解”》两篇文章后,笔者对比两位老师解法及自己对本类题的思考,认为解决这类问题也可以概括为以下三步:一画,二移,三代入.一、三步方法的由来直线的的平移也就是点的平移.在直角坐标系中线段的平移可南端点的横、纵坐标进行加、减来完成.
Read “primary and secondary mathematics” junior high school version 12 of 2014 published in the meeting of the static teacher “parallelogram exploration” and Wang Qiguang teacher “free” painting “easy ” solution "two articles After comparing the two teachers and their own method of solving this type of thinking, that the solution to these problems can also be summarized as the following three steps: one draw, two shifts, three generations into one or three-step method of the origin of the linear translation Is the point of translation in Cartesian coordinates of the line of translation of the southern endpoint of the horizontal and vertical coordinates plus, minus to complete.