数学解题,如果是纯粹的解题,那无异于题海战术,解再多的题也仅是事倍功半.但如若能将个知识点和题目关联起来,以变式的形式进行巩固,往往会收到事半功倍的效果.如图1,已知直线AB、CD分别交直线EF于点M、N,MG和NH分别是∠BME和∠DNM的角平分线,且∠1=∠2,你能得出什么结论?此时有好多学生得出相等的角 Mathematical problem solving, if it is a pure problem-solving, it is tantamount to the title of the sea tactics, solution to the problem is only more effective and less .But if a knowledge can be associated with the topic, to consolidate the form of variants, often Will receive a multiplier effect .As shown in Figure 1, known lines AB, CD respectively AC line EF at points M, N, MG and NH are 角 BME and ∠ DNM angle bisector, and ∠1 = ∠2, you What conclusions can be drawn? Many students come to equal angles at this time