Calculation of areas

import java.util.Scanner;
public class Main
{
    public static void main(String args[])
    {
        System.out.println("Enter your Choice: 1, 2, 3, 4?");
        Scanner sc = new Scanner(System.in);
        int ch = sc.nextInt();
        switch(ch)
        {
            case 1: System.out.println("Enter radius for the circle:");
                float r = sc.nextFloat();
                float area  = 3.14f*r*r;
                System.out.println("Area:"+area);
                break;
            case 2: System.out.println("Enter side for square:");
                int FSide1 = sc.nextInt();
                int area1 = FSide1*FSide1;
                System.out.println("Area:"+area1);
                break;
            case 3: System.out.println("Enter height and base for triangle:");
                float FSide2 = sc.nextFloat();
                float TSide2 = sc.nextFloat();
                float area2 = (FSide2*TSide2)/2;
                System.out.println("Area:"+area2);
                break;
            case 4: System.out.println("Enter length and breadth for rectangle:");
                int FSide3 = sc.nextInt();
                int TSide3 = sc.nextInt();
                int area3 = FSide3*TSide3;
                System.out.println("Area:"+area3);
                break;
            default:
                System.out.println("Invalid Input");
                break;
        }
    }
}