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Using polar equations for conic sections, we research conic circumscribed n-sided polygons(n ≥ 4) deeply on the basis of papers~([1-3]). We obtain a general fixed value theorem for directed areas of some triangles in conic circumscribed n-sided polygons and derive as many as n(n -3) concurrent points of three lines and some other collinear, equiareal results in conic circumscribed n-sided polygons(n ≥ 4). So the results of papers~([1-3])are unified.