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九点圆是平面几何中的著名定理,它以结构简洁、形式优美、内容丰富而著称,各种推广层出不穷.文[1]将九点圆推广为库里奇—大上定理和圆内接多边形的九点圆,文[2]将九点圆推广为圆内接闭折线k+1号圆,文[3]将九点圆推广为三角形的九点二次曲线,文[4]将九点圆推广为有心圆锥曲线上三角形的九点有心圆锥曲线,将库里奇—大上定理推广为有心圆锥曲线上四边形的九点有心圆锥曲线,有心圆锥曲线上多边形的九点
The nine-point circle is a famous theorem in plane geometry, which is famous for its concise structure, beautiful form and rich content, and various promotion are endless. [1] The nine-point circle is generalized to the Curie- The polygons’ nine-point circle, the text [2] will promote the nine-point circle into a circle within the circle closed line k + 1 circle, the text [3] will promote the nine point circle as a triangular nine point quadratic curve. The nine-point circle is a nine-point conical curve with the conic of the triangle on the conic curve. The Cubic theorem is extended to the nine-point conical curve of the quadrangle with the conic curve. The nine points of the conic polygons