关于牛顿线的定理及其推论

A Theorem on Newton Lines and Its Corollary

给出了关于完全四线形的牛顿线的一个新定理 ,并用该定理直接证明了射影几何中一类共点、共线命题 .

In this paper, we give a new theorem on Newton lines of a complete quadrilateral,and use it to prove direct a type of proposition of common point and common line in the projective geometry.