平行四边形存在性问题是中考热点之一,通常借助于函数图象探究满足某些条件的平行四边形是否存在.主要考查平行四边形的判定和性质、函数解析式的确定和性质等基础知识,考查识图作图、运算求解、数学表达等能力,考查数形结合、分类讨论、函数与方程等数学思想方法.学生对于这类问题的求解常有畏惧感,学生往往对这类问题没有一个比较明确的思 The existence of parallelogram is one of the hottest points in the test, usually by means of functional images to explore the existence of parallelograms that meet certain conditions, mainly to examine the basic knowledge of the judgment and properties of parallelograms, the determination and nature of analytic functions, Graph drawing, arithmetic solving, mathematical expression and other abilities, examining mathematical combination methods, classification discussion, functions and equations, etc. Students often have fear of solving such problems, and students often do not have a clear definition of such problems Thinking