影子类问题,以学生的生活实践为基础,考查学生应用相似三角形的数学模型解决实际问题的能力,是初中数学应用中一个常见的问题,也是近年中考较为青睐的题型之一,现对这类问题进行分类解析.一、问题解决浙教版九年级上册第四章第五节“相似三角形的性质及其应用”的第三课时的《作业本》32页有这么一个问题.如图1,小亮欲测量一电线杆AB的高度,他站在该电线杆的影 Based on the students ’life practice, examining students’ abilities of using similar triangle mathematical models to solve practical problems is a common problem in junior high school mathematics application and one of the more favored ones in recent years. Class problems to solve the problem. First, the problem-solving Zhejiaoban ninth grade on the fourth chapter fifth quarter “similar to the nature of the triangle and its application,” the third class “homework” 32 pages have such a problem. Figure 1, a small light To measure the height of a pole AB, he stood in the shadow of the pole