“已知两边及一边的对角,判断三角形解的个数”问题是一个有趣且值得研究的问题,是学生难以把握的难点问题.作为一线教师,有责任思考如何突破该难点.文[1],文[2],文[3],文[4]相继讨论了该问题的解法,较教材的图解法明显简单,但各有优缺点.拜读上述文章后,笔者对这类问题简易解 The problem of “diagnosing the number of triangle solutions on both sides and on one side” is an interesting and worthy problem to study. It is a difficult problem that students can hardly grasp. As a front-line teacher, it is responsible to think about how to overcome this difficulty. ], [2], [3], [4] discussed the solution of this problem one after another, and it is obviously simpler than the graphic method of the teaching material, but each has its own advantages and disadvantages. After reading the above article, the author has a simple solution to this type of problem.