全等三角形是研究图形的重要工具,也是以后学习平行四边形、圆和相似三角形的基础.在许多情况下,全等三角形是解决有关角、线段的数量关系以及直线的位置关系的问题的重要着眼点.想要学好全等三角形,同学们一定要领会下面的“三部曲”.一恰当选择判定方法判定三角形全等的方法,有SAS,ASA,AAS,SSS以及HL(仅适用于直角三角形),其中“边”的条件不可或缺.AAA,SSA都不能作为三角形全等的判定方 The congruent triangles are an important tool for studying graphics and they are also the basis for learning parallelograms, circles and similar triangles in the future. In many cases, congruent triangles are an important consideration for solving the problem of the relation between the angles, the number of lines and the positional relationship of the lines If you want to learn congruent triangles, students must understand the following “trilogy.” A Proper Selection Judging Method The method of judging triangle congruent includes SAS, ASA, AAS, SSS, and HL Right-angled triangle), where “edge ” conditions are indispensable.AAA, SSA can not be used as the judgment of triangle congruent square