《在初中阶段关于角的平分线应掌握的知识点》一文(原载于《中小学数学》2015年第3期)中从如何用尺规作图作角平分线、角的平分线的性质在实际生活中的应用、与角平分线有关的面积问题及如何用角的平分线的对称性、如何添加辅助线等四个方面做了论述,其中在“三角形的角平分线有关知识点”这段论述中,作者重点描述了“和三角形面积结合的题目”.其实关于三角形的角平分线这个知识点中还有两个 How to use the ruler as the angle bisector, the nature of the bisector of the angle in the “knowledge point of the bisector of the angle of the middle school” (originally published in “Mathematics of Primary and Secondary Schools”, 2015, No. 3) In the practical application of life, with the corner bisector area problem and how to use the bisector of the angle symmetry, how to add the auxiliary line and other four aspects were discussed, where the triangle bisector of the knowledge point “In this discussion, the author focuses on the ” and the triangle area with the topic "In fact, there are two points on the angular bisector of the triangle of knowledge