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利用相似三角形对应边的比值相等求解线段的长,是相似三角形教学中常遇到的题型.针对这一问题,在教学上可以从巧寻恰当的比例等式、巧列可解的方程、巧用隐含的相似图形三个方面寻求解题方法.
Using the ratio of similar triangles to the corresponding edge to calculate the length of the line segments is a common problem in the teaching of similar triangles.To solve this problem, we can find the appropriate proportional equation, Use implicit similarity graph three ways to solve the problem.