利用面积关系建立线段之间的关系,或根据面积有关性质将线段关系转化为面积关系,通过解方程或适当变形,从而解决线段的有关问题。由面积关系来建立线段关系常利用以下几种方法:(1)利用一个图形面积的几种不同的表示方法;(2)利用面积相等;(3)利用一个图形的面积等于几个图形面积的和。 The use of area relations to establish the relationship between line segments, or according to the area of ​​the nature of the relationship between the line segment into an area relationship, by solving equations or appropriate deformation, so as to solve the relevant issues of the line segment. Establishing a line segment relationship from an area relationship often uses the following methods: (1) using several different representations of a graphic area; (2) using equal area; (3) using a graphic area equal to several graphic areas with.