Method Overriding

👨‍💼 Now let's add methods to our shape hierarchy. Each shape will override a method to provide its own implementation.

The Shape, Circle, and Rectangle classes from the previous exercise are already defined. You'll add and override the getArea() method.

🐨 Open

index.ts

and:

Add getArea(): number on Shape that returns 0
Override getArea() on Circle so a circle's area is π × radius² (use Math.PI)
Override getArea() on Rectangle so a rectangle's area is width × height
Keep exporting: export { Shape, Circle, Rectangle }

Fixtures and success criteria

const shape = new Shape('red')
const circle = new Circle('red', 5)
const rectangle = new Rectangle('blue', 10, 20)

shape.getArea() === 0
circle.getArea() is about 78.54 (within 0.01 of Math.PI * 25)
rectangle.getArea() === 200
Circle and rectangle areas are both greater than 0 and not equal to each other