khete kha

public class AreaCalculator {
    public double radius = 2.0;
    public double length = 4.0;
    public double width = 6.0;
    public double height = 5.0;
    public double base = 3.0;
    public double getAreaCircle(double radius) {
        this.radius = radius;
        double areaCircle = radius * radius * Math.PI;
        System.out.println("Area of the Circle: " + areaCircle + "m^2\n");
        return areaCircle;
    }
    public double getAreaTriangle(double length, double width) {
        this.length = length;
        this.width = width;
        double areaTriangle = (length * width) / 2;
        System.out.println("Area of the Triangle: " + areaTriangle + "m^2\n");
        return areaTriangle;
    }
    public double getAreaQuadrilateral(double height, double base) {
        this.height = height;
        this.base = base;
        double areaQuadrilateral = height * base;
        System.out.println("Area of the Quadrilateral: " + areaQuadrilateral + "m^2\n");
        return areaQuadrilateral;
    }
    public double getAreaCylinder(double radius, double height) {
        this.radius = radius;
        this.height = height;
        double areaCylinder = 2 * Math.PI * radius * (radius + height);
        System.out.println("Area of the Cylinder: " + areaCylinder + "m^2\n");
        return areaCylinder;
    }
    public static void main(String[] args) {
        AreaCalculator areaCalc = new AreaCalculator();
        getAreaCircle(double radius);

    }
}