Question

Problem a (PA4a.java) Write a program to evaluate the area of a triangle given the lengths of its sides using Heron's Formula. Here is an outline: Get the three side lengths from the user (which might have decimal values): a, b, c. Check to ensure that the sides are valid for a triangle. Importantly, the sum of the lengths of any two sides must be larger than the length of the third side (you must check all three sides this way). Calculate the semiperimeter (s): 1. 2. 3. a+b+c 2 4. Calculate the area: area = V s(s-a) (s-b)(s-c) You must format the output to have two decimal places (even if they are both o), and round if necessary. For example: Enter the length of side a: 3 Enter the length of side b: 4 Enter the length of side c: 5 The area is 6.00 http://en.wikipedia org/wiki/Heron%27.formula

Answer 1

Dear Student,

here is the complete Java code which perform the required task.

Please note that the below code has been compiled using javac compiler in ubuntu 16.04 system.

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Program:

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//import the required packages

import java.util.Scanner;

import java.lang.*;

//public class

public class Area
{

    //main class

    public static void main(String[] args)
    {

        //scanning input

        Scanner input = new Scanner(System.in);

        System.out.printf("Enter the length of side a: ");

        int a = input.nextInt();

        System.out.printf("Enter the length of side b: ");

        int b = input.nextInt();

        System.out.printf("Enter the length of side c: ");

        int c = input.nextInt();

        //calculating the seme-perimeter

        double s = (a + b + c) /2;

        //calculating the area

        double A = Math.sqrt(s * (s - a) * (s - b) * (s - c));

        //display the area

System.out.println("The area is: "+A);

    }

}//end of the program

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here i have attached the output of the program as a screen shot..

Output:

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Kindly Check and Verify Thanks...!!!