掌握了用三角形全等证明线段相等和角相等的知识以及添线构造全等三角形的基本方法后,我们将限于利用“全等三角形”、“等腰三角形”的有关定理,综合解证一些问题, 从中可以锻炼综合分析推理的能力. Having mastered the basic method of using equal triangles to prove the equality of the line segments and equal angles, and constructing equal triangles by adding lines, we will confine ourselves to using the theories of “congruent triangles” and “isosceles triangles” to comprehensively solve problems. , from which you can exercise a comprehensive analysis of the ability to reason.