Question

In a right triangle, the square of the length of one side is equal to the sum of the squares of the lengths of the other two sides. Write a program that prompts the user to enter the lengths of three sides of a triangle and then outputs a message indicating whether the triangle is a right triangle. Assume the user does not know the hypotenuse. You may NOT ask the user for the hypotenuse. Meaning, you have to check all 3 sides to verify that it is a right-angled triangle.

Answer 1

Answer:

C++ code is explained below

Explanation:

/Remove the following line

//if not using visual studio.

#include "stdafx.h"

//Import the required header files.

#include <iostream>

using namespace std;

//Define the main function.

int main(void)

{

    //Define the variables.

    double side1, side2, side3;

    //Prompt the user to enter the sides of the triangle.

    cout << "Enter the side of the triangle:" << endl;

    cout << "Enter first side of triangle:" << endl;

    cin >> side1;

    cout << "Enter second side of triangle:" << endl;

    cin >> side2;

    cout << "Enter third side of triangle:" << endl;

    cin >> side3;

    cout << endl;

    //Check if the triangle sides are valid

    if ((side1 + side2 > side3) &&

         (side1 + side3 > side2) &&

         (side2 + side3 > side1))

    {

         //Check the condition for right angle triangle

         if ((side3*side3 == (side1*side1 + side2*side2)) ||

             (side2*side2 == (side3*side3 + side1*side1)) ||

             (side1*side1 == (side3*side3 + side2*side2)))

//Display that the triangle is right-angled triangle.

             cout << "It is a right-angled triangle." << endl;

         else

//Display that the triangle is not the right-//angled triangle.

             cout << "It is not a right-angled triangle."

<< endl;

    }

    else

         //Display not the valid side.

         cout << "Not a valid side." << endl;

    //Remove the following line if

    //not using visual studio.

    system("pause");

    return 0;

}