所谓面积法,是指利用图形的面积关系,建立线段关系,从而有效地解决几何问题的一种方法.在解决几何问题时,出现以下条件:(1)给出的已知或所求的结果为面积;(2)所求结果与垂直线段有关;(3)是平行线间的三角形或四边形问题,这时,若能用面积法求解,就会特别巧妙简捷. The so-called area method refers to a method that uses the area relationship of the graph to establish the line segment relationship, thereby effectively solving the geometric problem. When solving the geometric problem, the following conditions occur: (1) Known or required results are given For the area; (2) The result is related to the vertical line segment; (3) is the triangle or quadrilateral problem between parallel lines. In this case, if the area method can be used to solve, it will be particularly clever and simple.