摘要
本文首先给出交比的定义、性质,然后分析交比在初等几何中的应用范围、基本方法、应用技巧,最后通过典型例题加以论证。
In this paper, we give the defition and charachater of cross ratio firstly;then we analysis it＇s range of application, basic method and the skill of application ; Lastly, we prove them by tipical case.
出处
《山东教育学院学报》
2009年第1期62-64,共3页
Journal of Shandong Education Institute
关键词
交比
射影几何
初等几何
蝴蝶定理
Cross Ratio
Projective Geometry
Elementary Geometry
Butterfly Theorem
