Triangle area by coordinates

import java.util.Scanner;

public class TriangleAreaByCoords {

    public static void main(String[] args) {

        Scanner input = new Scanner(System.in);
        //coordinates
        System.out.println("Enter X, Y for a:");
        double aX = input.nextDouble();
        double aY = input.nextDouble();
        System.out.println("Enter X, Y for b:");
        double bX = input.nextDouble();
        double bY = input.nextDouble();
        System.out.println("Enter X, Y for c:");
        double cX = input.nextDouble();
        double cY = input.nextDouble();

        double triangleArea = Math.abs((aX*(bY - cY) + bX*(cY - aY) + cX*(aY - bY))/2);

        System.out.println("Triangle area = " + Math.round(triangleArea));

    }

}