C#Exams 1. Triangle (on Java Code)

import java.util.Scanner;

class Point {
    private double x, y;

    public double getX() {
        return x;
    }

    public void setX(double x) {
        this.x = x;
    }

    public double getY() {
        return y;
    }

    public void setY(double y) {
        this.y = y;
    }

    public Point(double x, double y) {
        // TODO Auto-generated constructor stub
        this.x = x;
        this.y = y;
    }

    public static double distanceBetween(Point point1, Point point2) {
        double deltaX = point1.x - point2.x;
        double deltaY = point1.y - point2.y;

        return Math.sqrt((deltaX * deltaX) + (deltaY * deltaY));
    }

}

public class _1_Triangle {

    public static void main(String[] args) {
        // TODO Auto-generated method stub
        Scanner scan = new Scanner(System.in);
        Point[] triangle = new Point[3];
        for (int i = 0; i < triangle.length; i++) {
            int pointX = scan.nextInt();
            int pointY = scan.nextInt();
            triangle[i] = new Point(pointX, pointY);
        }

        double[] triangleSides = calculateLengthsOf3SidesOfGivenTriangle(triangle);

        boolean isTriangle = checkGiven3PointsCanFormTriangleOrNot(triangleSides);
        if (isTriangle) {
            System.out.println("Yes");
            double areaTriangle = calculateAreaOfGivenTriangle(triangleSides);
            System.out.printf("%.2f\n", areaTriangle);
        } else {
            System.out.println("No");
            System.out.printf("%.2f\n", triangleSides[0]);
        }

    }

    private static double[] calculateLengthsOf3SidesOfGivenTriangle(
            Point[] triangle) {
        // TODO Auto-generated method stub
        double[] sides = new double[3];
        for (int i = 0; i < sides.length; i++) {
            sides[i] = Point
                    .distanceBetween(triangle[i], triangle[(i + 1) % 3]);
        }

        return sides;
    }

    private static boolean checkGiven3PointsCanFormTriangleOrNot(double[] sides) {
        for (int i = 0; i < sides.length; i++) {
            double sumOf2Sides = sides[i] + sides[(i + 1) % 3];
            if (sumOf2Sides <= sides[(i + 2) % 3]) {
                return false;
            }
        }

        return true;
    }

    private static double calculateAreaOfGivenTriangle(double[] sides) {
        // TODO Auto-generated method stub
        double perimeter = (sides[0] + sides[1] + sides[2]) / 2;
        double area = perimeter;
        for (int i = 0; i < sides.length; i++) {
            area *= perimeter - sides[i];
        }

        area = Math.sqrt(area);
        return area;
    }
}