圆锥曲线是平面在圆锥面上所截得的曲线.如果截面不通过圆锥的顶点,根据不同的情况所截得的曲线有圆、椭圆、双曲线和抛物线.由于其中的圆可看成是椭圆的特殊情况,故通常把圆锥曲线作为椭圆、双曲线和抛物线三者的总称.中学教材中的圆锥曲线是用代数方法研究的几何,它处于代数与几何的交汇处,由圆锥 Conic curve is the plane of the cone in the surface of the truncated curve.If the cross-section does not pass the cone vertex, according to the different circumstances of the interception of the curve of a circle, ellipse, hyperbola and parabola. Because the circle can be seen as an ellipse The conic curve is generally used as the ellipse, hyperbola and parabola.The conic curve in the middle school textbook is an algebraic method to study the geometry, which is at the intersection of algebra and geometry, which consists of a cone