import math

class Circle:

    def __init__(self, radius):
        self.__radius = radius

    def getRadius(self):
        return self.__radius

    def setRadius(self, radius):
        self.__radius = radius

    def area(self):
        return math.pi * self.__radius ** 2

    def __add__(self, another_circle):
        return Circle( self.__radius + another_circle.__radius )

class rec(Circle):

    def __init__(self,radius, diamtr):
        super().__init__(radius)
        self.__diamtr = diamtr

    def getdiamtr(self):
        return self.__diamtr * self.getRadius()


c = rec(6,9)
print(c.getdiamtr())
print(c.getRadius())