黄金分割用英语怎么说？

the law of golden section

golden section
n.（名词）
A ratio, observed especially in the fine arts, between the two dimensions of a plane figure or the two divisions of a line such that the smaller is to the larger as the larger is to the sum of the two, a ratio of roughly three to five.
黄金分割：是一种线段的分割或一种几何图形的比例，特别是在美术设计中能看到，其中较小度量与较大度量和较大度量与整体之比相等，两度量间大约的比例为3：5

golden mean
golden section

golden mean golden section