在几何学习中,同学们经常会遇到求证线段等积式的问题.一般情况下,我们可以根据相似三角形中或平行线间线段的比例关系,来证明线段等积式,但是同一直线上的线段等积式显然无法直接利用上述关系来证明.这就需要进行一些等量代换,巧妙地将同一直线上的线段转化为相似三角形中或平 In the geometry learning, the students often encounter the problem of verifying the line segment isomorphism. Under normal circumstances, we can prove the line segment isomorphism based on the proportional relationship between similar triangles or lines between parallel lines, but on the same line The line segment isomorphism obviously cannot be proved directly by using the above relationship. This requires some equivalent substitution, and skillfully transforms the line segment on the same line into a similar triangle or flat