TriangleArea

/*2.Write a program that enters 3 points in the plane (as integer x and y coordinates),
calculates and prints the area of the triangle composed by these 3 points.
 Round the result to a whole number. In case the three points do not form a triangle,
print "0" as result.*/

/*Tests:
-5 10 25 30 60 15 ans: 575
53 18 56 23 24 27 ans: 86
1 1 2 2 3 3 ans: 0*/
import java.util.Scanner;

public class TriangleArea {

    public static void main(String[] args) {
        Scanner input = new Scanner(System.in);
        System.out.println("Enter the coords of the triangle!");
        double aX =input.nextDouble();
        double aY =input.nextDouble();

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

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

        int area = (int)(Math.abs(((aX*(bY-cY))+(bX*(cY-aY))+(cX*(aY-bY)))/2));
        System.out.println("The triangle area is = " + area);
    }
}