三角尺是学生们最常用也是最熟悉的几何工具,近几年出现了以转动三角尺为背景的动手操作题,此类题型是数形结合、分类讨论思想的拓展和深化,有利于学生创新能力的培养和实践能力的提高.同时,这类题型也符合新课程改革的理念,因此成为中考命题的新热点. Triangular ruler is the most commonly used and most familiar tool for students. In recent years, hands-on exercises with rotating triangular ruler as the background have emerged. Such questions are the combination of number and form, the expansion and deepening of the discussion on classification, which is good for students Innovative ability and practical ability to improve.At the same time, these types of questions are also in line with the concept of the new curriculum reform, it becomes a new hot topic in the test.