有关相似的内容涉及相似图形,相似三角形的判定和性质,以及相似在解决实际问题中的应用.学生在学习该内容时,难免会出现一些疏漏.本文分析学生中常见的错误,以期让读者得到启迪.一、没有找准对应边例1如图1,利用标杆BE测量建筑物的高度,标杆BE高1.5 m,测得AB=2 m,BC=14 cm,则楼高CD为m.错解∵BE∥CD,∴△ABE∽△ACD. The similar content involves similar figures, the judgment and nature of similar triangles, and similar applications in solving practical problems.Students learning the content, it is inevitable that there will be some omissions.This article analyzes the common mistakes of students, in order to allow readers to get Enlightenment. First, there is no corresponding correspondence edge example 1 Figure 1, the use of benchmarking BE measuring the height of the building, the benchmark BE high 1.5 m, measured AB = 2 m, BC = 14 cm, then the height CD is m. Solution ∵BE∥CD, ∴ △ ABE∽ △ ACD.