论文部分内容阅读
在“比例线段”一节中,常通过添加平行线,构造A型或X型进而证明线段之间的比例关系,现通过三角形内角平分线定理的几种证明方法加以说明。三角形内角平分线定理:三角形内角平分线分对边所得的两条线段和这个角的两
In the section “Proportional Line Segments”, we often add the parallel lines to construct the A-type or X-type and prove the proportional relationship between the line segments. Now, we use the several proof methods of the triangle internal angle bisector line theorem to illustrate. Theorem of triangle internal bisector: the two segments of the triangle bisector bisect and the two of this angle