曹冲称象是一个尽人皆知的故事 ,但其中却蕴含了深刻的数学思想——转化的思想 .在中学的立体几何学习中 ,我们不仅应该注意在平面上作空间形体的图形的方法 ,更应该研究如何利用图形来解决和探讨空间问题的方法 .显然 ,后者较前者更为重要 .因为在研究立体几何问题的过程中 , Cao Chong said that elephants are a well-known story, but they contain deep mathematical thinking - the idea of ​​transformation. In the study of solid geometry in middle schools, we should not only pay attention to the method of making spatial shapes in the plane, but should study How to use graphs to solve and explore methods of spatial problems. Obviously, the latter is more important than the former. Because in the process of studying three-dimensional geometric problems,