欧拉定理是数学第二册(下)中的研究性 学习课题．学习欧拉定理有助于我们进一步掌 握多面体的顶点数、面数和棱数之间的关系． 欧拉定理是指简单多面体的顶点数V、面 数F和棱数E之间有关系V+F-E=2． Euler’s theorem is a research topic in the second volume of mathematics (below). Learning Euler’s theorem helps us to further grasp the relationship between the polytope’s vertices, faces, and edges. The Euler theorem refers to the relationship between the number of vertices V, the number of faces F, and the number of edges E of a simple polyhedron V+F-E=2.