二次曲线基本量的关联

摘要

Based on several relation of extremity and pole,project in image the basic quantity of quadratic curves,which include center,diameter,asymptote,principal axis and focus,were discussed,the inside relation of quadratic curve basic quantity were announced.%基于射影几何的极点与极线关系,讨论了二次曲线的基本量：中心、直径、渐近线、主轴、焦点、准线,以揭示二次曲线基本量的内在关系.