【摘要】 通过代数法给出并证明了圆锥曲线的一个定理 ,得出关于圆锥曲线内接三角形的一系列推论 ,给出了圆关于弦切角的性质和点对于圆的幂的性质在一般圆锥曲线中成立的情况 ,得到一种过圆锥曲线上一点的切线的作法 .更多还原

【Abstract】 In this paper,it is proposed and proved that a theorem of conic section by using the methods of algebraic,and a series of corollaries about inscribed triangle of conic section are obtained.Further,we also give some of things,in which the property angle of tangent chord and power of point with respect to a circle are right,and a new method of construction for tangent through a point on the conic section are achieved.更多还原