segment.centroid
        Point2D(10, 15/2)
        >>> lower_segment.centroid
        Point2D(10, 5/2)

        References
        ==========

        .. [1] https://github.com/sympy/sympy/wiki/A-method-to-return-a-cut-section-of-any-polygon-geometry

        z(This line does not intersect the polygonr