Question

Create an abstract class polygon that has a method getnoofsides() and getarea() and it has three subclasses triangle, rectangle and square each with its own two methods getnoofsides and getarea and their respective implementations accordingly.

python

Answer 1

from abc import ABC, abstractmethod

"""Python does not support abstract class but we have abc which stands for Abstract Base Classes for abstract class"""


class Polygon(ABC):  # parent class
    @abstractmethod
    def getnoofsides(self):
        pass

    def getarea(self, b, h):
        pass

    def getareasquare(self, length):  # square has all sides equal so only one parameter needed
        pass


class Triangle(Polygon):
    def getnoofsides(self):
        super().getnoofsides()  # super method to override the parent class method
        print("It's a triangle with 3 sides")

    def getarea(self, b, h):
        super().getarea(b, h)
        area = (1 / 2) * b * h
        print("Area of triangle is:", area)


class Rectangle(Polygon):
    def getnoofsides(self):
        super().getnoofsides()
        print("It's a Rectangle with 4 sides")

    def getarea(self, b, h):
        super().getarea(b, h)
        area = h * b
        print("Area of triangle is:", area)


class Square(Polygon):
    def getnoofsides(self):
        super().getnoofsides()
        print("It's a square with 4 sides")

    def getareasquare(self, length):
        super().getareasquare(length)
        areaofsquare = length * length
        print("Area of square is:", areaofsquare)


T = Triangle()
T.getnoofsides()
T.getarea(float(input("Enter the breadth")), float(input("Enter the height")))  # float is used to change string input
# to float value (type casting) 

R = Rectangle()
R.getnoofsides()
R.getarea(float(input("Enter the breadth")), float(input("Enter the length")))

S = Square()
S.getnoofsides()
S.getareasquare(float(input("Enter the length")))