圆锥曲线特征点和线的若干性质

Some Properties of Feature Points and Lines of Conic Curve

圆锥曲线焦点、顶点、准线和类准线是圆锥曲线的主要特征点和主要特征线,根据它们之间的关系,应用线到线的角公式,推导出一组重要的有趣的不等式,为解决相关问题提供解借鉴。

Focus, vertex, directrix and eccentricity are major feature points and lines of conic curve. The paper deduces a set of important and interesting inequalities based on their relations and using angle formula from line to line, which provides reference for solving concerning problems.