Desargues命题的应用

Application of Desargues Proposition

由Desargues命题和Desargues逆命题证明了三点共线或三线共点的问题。还应用这两个命题解决了轨迹问题与求定点问题及作图问题。

By Desargues proposition and Desargues converse proposition, we can prove the problem of three point sharing one line and three line sharing one point; by the application of this two propsition, we can solve the problem of trajectory and fixing point and plotting.