图形分解法,即把一个复杂的几何图形分解成一些简单、易懂的图形,从而使问题容易得到解决。一、图形分解法在证明全等三角形中的运用在证明全等三角形时应抓住下列几种特殊图形:图1在图1中都隐含了一条件,即公共边、公共角、对顶角。图2例1已知:如图2,AB=AC,DB=DC,F是AD的延长 The graphic decomposition method breaks down a complex geometry into simple, easy-to-understand graphics that make the problem easier to solve. First, the graphical decomposition method to prove the use of congruent triangles in the proof of congruent triangles should seize the following kinds of special graphics: Figure 1 in Figure 1 implies a condition, namely the public side, the public angle, the top angle. Figure 2 Example 1 is known: Figure 2, AB = AC, DB = DC, F is the extension of AD