class Shape:
    def area(self):
        pass

class Square(Shape):
    def __init__(self, top_left, side):
        self.__top_left = top_left
        self.__side = side

    def area(self):
        return self.__side * self.__side

class Rectangle(Shape):
    def __init__(self, top_left, height, width):
        self.__top_left = top_left
        self.__height = height
        self.__width = width

    def area(self):
        return self.__height * self.__width

class Circle(Shape):
    def __init__(self, center, radius):
        self.__center = center
        self.__radius = radius

    def area(self):
        PI = 3.141592653589793
        return PI * self.__radius**2


class Geometry:


    def area(self, shape):
        if isinstance(shape, Square):
            return shape.side * shape.side

        if isinstance(shape, Rectangle):
            return shape.height * shape.width

        if isinstance(shape, Circle):


        raise NoSuchShapeException()