The server is under maintenance between 08:00 to 12:00 (GMT+08:00), and please visit later.
We apologize for any inconvenience caused
Login  | Sign Up  |  Oriprobe Inc. Feed
China/Asia On Demand
Journal Articles
Laws/Policies/Regulations
Companies/Products
Bookmark and Share
san jiao xing de xing zhi ding li zai si mian ti zhong de tui guang
Author(s): 
Pages: 16-19
Year: Issue:  6
Journal: ZHONGXUE SHUXUE ZAZHI(GAOZHONG BAN)

Abstract:  空间最基本的几何图形是四面体,它的每一个面都是三角形,当共顶点的三条棱逐渐缩短,直到该点落到对面三角形所在平面,空间图形又回到平面图形.也就是说,四面体与三角形之间有着必然的联系.三角形的如下性质已经类比地推广到了四面体中:
Related Articles
No related articles found