need help with this java program i have literally no clue about teacher doesnt h

Question

need help with this java program i have literally no clue about teacher doesnt help much at all. All i know is i need to use import.java.util.scanner(or something like that)

1. Geometrical problem: area of a triangle: Write, compile and run a Java program called AreaOfTriangle.java that prompts the user to enter three points in Cartesian coordinates (x1, y1), ( x2, y2), ( x3, y3) of a triangle and calculates its area based on the user input values. The program then displays the calculated area. The formula for computing the area of a triangle is s = (side1 + side2 + side3)/ 2; (s is the semi-perimeter of the triangle) area = ?s( s - side1)( s - side2)( s - side3) Any side would involve finding out the distance between a pair of points. The distance between two points with coordinates (x1, y1) and (x2, y2) can be found out by the formula s = ?( x2 - x1) 2 + ( y2 - y1) 2

Sample output (The print in blue is generated by the program while running and the one in green is what the user provides as input):

First Run

This program reads in the x and y coordinates of the three points of a triangle and calculates the area of the triangle based on the coordinates. --------------------------------------------------

Enter the x and y coordinates of the first point:1.0 1.0

Enter the x and y coordinates of the second point: 1.0 5.0

Enter the x and y coordinates of the third point: 5.0 1.0

The first side is: 4.0 units

The second side is: 5.656854249492381 units The third side is: 4.0 units

The area of the triangle is: 7.999999999999997 square units

Second Run This program reads in the x and y coordinates of the three points of a triangle and calculates the area of the triangle based on the coordinates. --------------------------------------------------

Enter the x and y coordinates of the first point: 2.5 3.6

Enter the x and y coordinates of the second point: 5.75 4.96

Enter the x and y coordinates of the third point: 3.2 9.8

The first side is: 3.523081037955272 units

The second side is: 5.470658095695618 units The third side is: 6.2393909959226 units

The area of the triangle is: 9.599000000000004 square units

Explanation / Answer

AreaOfTriangle.java

import java.util.Scanner;

public class AreaOfTriangle {

public static void main(String[] args) {

//Declaring variables

double x1,y1,x2,y2,x3,y3,s1,s2,s3;

/*

* Creating an Scanner class object which is used to get the inputs

* entered by the user

*/

Scanner sc = new Scanner(System.in);

//Getting the input entered by the user

System.out.print("Enter the x and y coordinates of the first point:");

x1=sc.nextDouble();

y1=sc.nextDouble();

System.out.print("Enter the x and y coordinates of the second point:");

x2=sc.nextDouble();

y2=sc.nextDouble();

System.out.print("Enter the x and y coordinates of the third point:");

x3=sc.nextDouble();

y3=sc.nextDouble();

//calling the method which calculate the distance between two points

s1= findDistance(x1, y1, x2, y2);

s2= findDistance(x2, y2, x3, y3);

s3= findDistance(x3, y3, x1, y1);

//Displaying the Sides of the Triangle

System.out.println("The first side is:"+s1+" units");

System.out.println("The second side is:"+s2+" units");

System.out.println("The third side is:"+s3+" units");

//Calculating the Semi-perimeter of the Triangle

double s=(s1+s2+s3)/2;

//Calculating the area of the Triangle

double area=areaOfTriangle(s1,s2,s3);

System.out.println("The area of the triangle is:"+area+" square units");

}

/* This method is used to calculate

* the area of the triangle using Herons formula

*/

private static double areaOfTriangle(double side1, double side2, double side3)

{

double p=(side1+side2+side3)/2;

double area=Math.sqrt(p*(p-side1)*(p-side2)*(p-side3));

return area;

}

//This method will find the length of each side of the triangle

private static double findDistance(double x1, double y1, double x2,

double y2) {

return Math.sqrt(Math.pow((x2 - x1), 2) + Math.pow((y2 - y1), 2));

}

}

________________

Output:

Enter the x and y coordinates of the first point:1.0 1.0
Enter the x and y coordinates of the second point:1.0 5.0
Enter the x and y coordinates of the third point:5.0 1.0
The first side is:4.0 units
The second side is:5.656854249492381 units
The third side is:4.0 units
The area of the triangle is:7.999999999999997square units

_____________Thank You

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