Area of a triangle inscribed in a rectangle which is inscribed in an ellipse

Given here is an ellipse with axes length 2a and 2b, which inscribes a rectangle of length l and breadth h, which in turn inscribes a triangle.The task is to find the area of this triangle.
Examples:

Input: a = 4, b = 3
Output: 12

Input: a = 5, b = 2
Output: 10

Approach: 
We know the Area of the rectangle inscribed within the ellipse is, Ar = 2ab(Please refer here), 
also the area of the triangle inscribed within the rectangle s, A = Ar/2 = ab(Please refer here)
Below is the implementation of the above approach:

C++

// C++ Program to find the area of the triangle
// inscribed within the rectangle which in turn
// is inscribed in an ellipse
#include <bits/stdc++.h>
using namespace std;

// Function to find the area of the triangle
float area(float a, float b)
{

    // length of a and b cannot be negative
    if (a < 0 || b < 0)
        return -1;

    // area of the triangle
    float A = a * b;
    return A;
}

// Driver code
int main()
{
    float a = 5, b = 2;
    cout << area(a, b) << endl;
    return 0;
}

Java

   // Java Program to find the area of the triangle
// inscribed within the rectangle which in turn
// is inscribed in an ellipse

import java.io.*;

class GFG {

// Function to find the area of the triangle
static float area(float a, float b)
{

    // length of a and b cannot be negative
    if (a < 0 || b < 0)
        return -1;

    // area of the triangle
    float A = a * b;
    return A;
}

// Driver code


    public static void main (String[] args) {
    float a = 5, b = 2;
    System.out.println(area(a, b));
    }
}
//This code is contributed by anuj_67..

Python3

# Python 3 Program to find the
# area of the triangle inscribed
# within the rectangle which in
# turn is inscribed in an ellipse

# Function to find the area
# of the triangle
def area(a, b):

    # length of a and b cannot
    # be negative
    if (a < 0 or b < 0):
        return -1

    # area of the triangle
    A = a * b
    return A

# Driver code
if __name__ == '__main__':
    a = 5
    b = 2
    print(area(a, b))

# This code is contributed
# by Surendra_Gangwar

C#

// C# Program to find the area of
// the triangle inscribed within
// the rectangle which in turn
// is inscribed in an ellipse
using System;

class GFG
{

// Function to find the
// area of the triangle
static float area(float a, float b)
{

    // length of a and b
    // cannot be negative
    if (a < 0 || b < 0)
        return -1;

    // area of the triangle
    float A = a * b;
    return A;
}

// Driver code
static public void Main ()
{
    float a = 5, b = 2;
    Console.WriteLine(area(a, b));
}
}

// This code is contributed by ajit

PHP

<?php
// PHP Program to find the area
// of the triangle inscribed within
// the rectangle which in turn
// is inscribed in an ellipse

// Function to find the
// area of the triangle
function area($a, $b)
{

    // length of a and b cannot
    // be negative
    if ($a < 0 || $b < 0)
        return -1;

    // area of the triangle
    $A = $a * $b;
    return $A;
}

// Driver code
$a = 5;
$b = 2;
echo area($a, $b);

// This code is contributed
// by Mahadev99
?>

Javascript

<script>

// javascript Program to find the area of the triangle
// inscribed within the rectangle which in turn
// is inscribed in an ellipse

// Function to find the area of the triangle
function area(a , b)
{

    // length of a and b cannot be negative
    if (a < 0 || b < 0)
        return -1;

    // area of the triangle
    var A = a * b;
    return A;
}

// Driver code

var a = 5, b = 2;
document.write(area(a, b));

// This code contributed by Princi Singh

</script>

Output:

10

Time complexity: O(1)

Auxiliary Space: O(1)