Triangle

import java.util.Scanner;

public class _1_Triangle {

    public static void main(String[] args) {
        Scanner input=new Scanner(System.in);

        double aX=input.nextDouble();
        double aY=input.nextDouble();

        double bX=input.nextDouble();
        double bY=input.nextDouble();

        double cX=input.nextDouble();
        double cY=input.nextDouble();

        double c=Math.sqrt((bX-aX)*(bX-aX)+(bY-aY)*(bY-aY));
        double b=Math.sqrt((cX-aX)*(cX-aX)+(cY-aY)*(cY-aY));
        double a=Math.sqrt((cX-bX)*(cX-bX)+(cY-bY)*(cY-bY));

        if((a+b)>c && (a+c)>b && (b+c)>a){
            System.out.println("Yes");
            double area= calculateArea(a,b,c);
            System.out.printf("%.2f",area);
        }
        else{
            System.out.println("No");
            System.out.printf("%.2f",c);
        }
    }

    public static double calculateArea(double a, double b, double c) {

        double p=(a+b+c)/2;
        double area =Math.sqrt(p*(p-a)*(p-b)*(p-c));
        return area;
    }

}