es match. The following
        example checks that the center of a circle is within the circle

        >>> center = 0, 0
        >>> c = Circle(center, radius=1)
        >>> c.contains_point(center)
        True

        The convention of checking against the transformed patch stems from
        the fact that this method is predominantly used to check if display
        coordinates (e.g. from mouse events) are within the patch. If you want
        to do the above check with data coordinates, you have to properly
        transform them first:

        >>> center = 0, 0
        >>> c = Circle(center, radius=1)
        >>> plt.gca().add_patch(c)
        >>> transformed_center = c.get_transform().transform(center)
        >>> c.contains_point(transformed_center)
        True

        )