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圆锥曲线是平面截圆锥所得的曲线.近几年从学考到高考的浙江省试卷中,不少动态的立体几何试题中虽着眼于空间的线面位置关系考察(表面上看与圆锥无关),但通过挖掘我们可以发现它们与圆锥有深刻的联系.而这一类型的立体几何试题考查主要有两种形式:一种是判断平面截圆锥所得的截面曲线形状,另一种是考查直线与圆锥的母线以及圆锥的母线与母线的位置关系.本文从一道学考试题出发讨论直线与圆锥的母线以及圆锥的母线与母线的位置关系.并得到
Conic curve is a flat truncated cone curve obtained in recent years from the college entrance examination in Zhejiang Province papers, a lot of dynamic three-dimensional geometry test in space although the focus on the relationship between the location of the surface (the surface has nothing to do with the cone) , But by digging we can find that they have a deep connection with the cones.This type of three-dimensional geometric test test there are two main forms: one is to determine the plane truncated cone cross-sectional curve shape, the other is to examine the straight line and Conical busbar and conical busbar and busbar position.This paper starts with a test problem of straight and conical busbar and cone busbar and busbar position relationship and get