立体几何是高中数学的重要内容之一,它对学生空间概念的建立、空间思维能力的形成和想象力的发展起着重要的作用.但是学生在学习立体几何时,常常感到十分困难.究其原因,一方面,是由于立体几何教材中抽象思维占主导地位,空间图形复杂.概念比较集中,学习方法与学生学习平面几何的方法有较大的差 Three-dimensional geometry is one of the important contents of high school mathematics. It plays an important role in the establishment of student space concepts, the formation of spatial thinking ability and the development of imagination. However, students often find it very difficult to learn three-dimensional geometry. The reason, on the one hand, is due to the fact that abstract thinking dominates the three-dimensional geometry textbooks, and spatial graphics are complex. The concepts are more concentrated, and there is a big difference between the learning methods and the way students learn plane geometry.