'Radius of the RegularPolygon
This is also the radius of the circumscribing circle.
Returns
radius : number or instance of Basic
See Also
sympy.geometry.line.Segment.length, sympy.geometry.ellipse.Circle.radius
Examples
>>> from sympy import Symbol
>>> from sympy.geometry import RegularPolygon, Point
>>> radius = Symbol(\'r\')
>>> rp = RegularPolygon(Point(0, 0), radius, 4)
>>> rp.radius
r'

@property
def radius(self):

    return self._radius
