medium Object-Oriented Programming

Shape Hierarchy with Inheritance

The Brief

CAD-Forge, a drafting toolkit, needs a geometry module. Rather than a bloated if-chain for each shape type, the team wants a clean inheritance hierarchy where every shape exposes the same interface (area, perimeter) but calculates them differently.

Acceptance Criteria

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4 Create one of each and print their area and perimeter to 2 decimal places

2 Define Rectangle(Shape) with width and height, overriding both methods

3 Define Circle(Shape) with radius, overriding both methods (use math.pi)

1 Define a base class Shape with methods area() and perimeter() that raise NotImplementedError

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solution.py

Python 3

import math

class Shape:
    def area(self):
        raise NotImplementedError

    def perimeter(self):
        raise NotImplementedError


# TODO: Rectangle subclass

# TODO: Circle subclass


# TODO: instantiate and print

Console