读了《中小学数学》(初中版)2010年7—8期上于志洪先生的《张角公式在求线段连比中的应用》的文章,感到解法新颖,收益匪浅.作为一线教师,我和我的学生对求解线段连比的问题,也作了深入的探究,发现了一种更便手学生理解的新方法.解题方法的依据是:1.若两个三角形的高(底)相等,则它们的面积之比等于相应的底(高)之比.2.等比定理,如果若干个比相等,那么这些比的 Read the “primary and secondary mathematics” (junior high school edition) in 2010 7-8 on the Yu Zhihong's “Zhang angle formula in the application of line segment ratio” article, feel the solution is novel, profiting .As a front-line teacher , I and my students solve the problem of line ratio, but also made in-depth exploration and found a more handy students to understand the new method.The problem-solving method is based on: 1. If the two triangles of high The ratio of their area is equal to the ratio of the corresponding bottom (high) .2. Equality theorem, if several ratio is equal, then these ratio