Computer scienceProgramming languagesKotlinObject-oriented programmingObject-oriented programming usage

Sealed class and interface

Shape area

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You have a sealed class called Shape. Declare a function called calculateArea(), which takes the sealed class as a parameter and returns the area as a Double.

You can use the following formulas:

Square $A = {a^2}$ where a is the side.

Rectangle $A = {w l}$ where w is the width and l is the length.

Circle $A = {πr^2}$ where r is the radius.

Triangle $A = {hb_b/2}$ where b is the base and $h_b$ is the height.

Pentagon $A = {\frac{1}{4}{\sqrt{5(5+2\sqrt5)} }} \times a^2$ where a is the side.

Write a program in Kotlin

// Add calculateArea() here

// Don't change this code

sealed class Shape {

data class Rectangle(val width: Double, val height: Double) : Shape()

data class Square(val side: Double) : Shape()

data class Circle(val radius: Double) : Shape()

data class Triangle(val base: Double, val height: Double) : Shape()

data class Pentagon(val side: Double) : Shape()

}

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