python-object-oriented-programming-learning/practice04again.py at main · Ahmev-Ayush/python-object-oriented-programming-learning · GitHub

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# revision


class Shape:
    def area(self):
        pass

    def perimeter(self):
        pass

class Square(Shape):
    def __init__(self, side):
        self.side = side
        super().__init__()

    def area(self):
        return self.side ** 2

    def perimeter(self):
        return 4 * self.side

class Circle(Shape):
    def __init__(self, radius):
        self.radius = radius
        super().__init__()

    def area(self):
        return 3.141592 * self.radius ** 2

    def perimeter(self):
        return 2 * 3.141592 * self.radius


class Triangle(Shape):
    def __init__(self, side1, side2, side3):
        self.side1 = side1
        self.side2 = side2
        self.side3 = side3
        super().__init__()

    def area(self):
        s = (self.side1 + self.side2 + self.side3)/2
        return (s * (s - self.side1) * (s - self.side2) * (s - self.side3)) ** 0.5

    def perimeter(self):
        return self.side1 + self.side2 + self.side3


circle  = Circle(11)
print(circle.area())

triangle = Triangle(3, 4, 5)
print(triangle.perimeter())
print(triangle.area())