Example: Calculate Rhombus Properties from Diagonals in C++

// Calculate Rhombus Properties from Diagonals
#include <iostream>
#include <cmath> // For sqrt and pow
#include <iomanip> // For setprecision
using namespace std;

int main() {
    // Step 1: Declare and initialize variables for diagonals
    double diagonal1;
    double diagonal2;

    cout << "Enter the length of the first diagonal (d1): ";
    cin >> diagonal1;
    cout << "Enter the length of the second diagonal (d2): ";
    cin >> diagonal2;

    // Step 2: Calculate the side using the Pythagorean theorem
    // The diagonals of a rhombus bisect each other at right angles.
    // This forms four right-angled triangles. Each triangle has legs d1/2 and d2/2,
    // and the hypotenuse is the side 'a' of the rhombus.
    double side = sqrt(pow(diagonal1 / 2, 2) + pow(diagonal2 / 2, 2));

    // Step 3: Calculate the area
    // The area of a rhombus is half the product of its diagonals.
    double area = (diagonal1 * diagonal2) / 2;

    // Step 4: Display the results
    cout << fixed << setprecision(2); // Format output to 2 decimal places
    cout << "\n--- Rhombus Properties ---" << endl;
    cout << "Given Diagonals: " << diagonal1 << " and " << diagonal2 << endl;
    cout << "Calculated Side Length: " << side << endl;
    cout << "Calculated Area: " << area << endl;

    return 0;
}