ExamPrepOne

package ExamPreparation;

import java.util.Scanner;

public class CourtesianTabletwo {

    public static void main(String[] args) {
        Scanner scan = new Scanner(System.in);
        double Ax = scan.nextDouble();
        double Ay = scan.nextDouble();
        double Bx = scan.nextDouble();
        double By = scan.nextDouble();
        double Cx = scan.nextDouble();
        double Cy = scan.nextDouble();

        double sumAB =Math.sqrt((Bx - Ax)*(Bx - Ax) + (By - Ay)*(By - Ay));
        double sumBC = Math.sqrt((Cx - Bx)*(Cx - Bx) + (Cy - By)*(Cy - By));
        double sumAC = Math.sqrt((Cx - Ax)*(Cx - Ax) + (Cy - Ay)*(Cy - Ay));
        if(sumAB + sumBC > sumAC && sumAC + sumBC > sumAB && sumAB + sumAC > sumBC ){
            double p = (sumAB + sumBC + sumAC)/2;
            double Area = Math.sqrt(p*(p-sumAB)*(p-sumBC)*(p-sumAC));
            System.out.println("Yes");
            System.out.printf("%.2f%n",Area);
        }
        else {
            System.out.println("No");
            System.out.printf("%.2f%n", sumAB);
        }

    }

}