学习了《三角形》这一章的知识和方法后，同学们都知道，应用全等三角形是证明线段相等或角相等最基本、最常用的方法．但具体证题时又感到难于着手，不知道如何应用全等三角形证明线段相等或角相等．为了帮助同学们克服这个困难，下面谈两点体会．一、要善于从复杂图形中识别 After learning the “triangle” chapter of the knowledge and methods, the students all know that the application of congruent triangles is to prove that the line segment is equal or the angle is the most basic and most commonly used method. However, when it comes to specific questions, it is difficult to start. We do not know how to apply equal triangles to prove that the line segments are equal or equal in angle. In order to help students overcome this difficulty, here are two things to talk about. First, be good at recognizing from complex graphics