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Largest square that can be inscribed within a hexagon which is inscribed within an equilateral triangle
• Last Updated : 17 Mar, 2021

Given here is an equilateral triangle of side length a, which inscribes a hexagon which in turn inscribes a square. The task is to find the side length of the square.
Examples:

```Input:  a = 6
Output: 2.538

Input: a = 8
Output: 3.384```

Approach
We know the, side length of a hexagon inscribed within an equilateral triangle is h = a/3. Please refer Largest hexagon that can be inscribed within an equilateral triangle .
Also, the side length of the square that can be inscribed within a hexagon is x = 1.268h Please refer Largest Square that can be inscribed within a hexagon.
So, side length of the square inscribed within a hexagon which in turn is inscribed within an equilateral triangle, x = 0.423a.
Below is the implementation of the above approach:

## C++

 `// C++ program to find the side of the largest square``// that can be inscribed within the hexagon which in return``// is incsribed within an equilateral triangle``#include ``using` `namespace` `std;` `// Function to find the side``// of the square``float` `squareSide(``float` `a)``{` `    ``// Side cannot be negative``    ``if` `(a < 0)``        ``return` `-1;` `    ``// side of the square``    ``float` `x = 0.423 * a;``    ``return` `x;``}` `// Driver code``int` `main()``{``    ``float` `a = 8;``    ``cout << squareSide(a) << endl;` `    ``return` `0;``}`

## Java

 `// Java program to find the side of the``// largest square that can be inscribed``// within the hexagon which in return is``// incsribed within an equilateral triangle``class` `cfg``{``    ` `// Function to find the side``// of the square``static` `float` `squareSide(``float` `a)``{` `    ``// Side cannot be negative``    ``if` `(a < ``0``)``        ``return` `-``1``;` `    ``// side of the square``    ``float` `x = (``0``.423f * a);``    ``return` `x;``}` `// Driver code``public` `static` `void` `main(String[] args)``{``    ``float` `a = ``8``;``    ``System.out.println(squareSide(a));` `}``}` `// This code is contributed by``// Mukul Singh.`

## Python3

 `# Python 3 program to find the side of the``# largest square that can be inscribed``# within the hexagon which in return``# is incsribed within an equilateral triangle` `# Function to find the side of the square``def` `squareSide(a):``    ` `    ``# Side cannot be negative``    ``if` `(a < ``0``):``        ``return` `-``1` `    ``# side of the square``    ``x ``=` `0.423` `*` `a``    ``return` `x` `# Driver code``if` `__name__ ``=``=` `'__main__'``:``    ``a ``=` `8``    ``print``(squareSide(a))` `# This code is contributed by``# Sanjit_Prasad`

## C#

 `// C# program to find the side of the``// largest square that can be inscribed``// within the hexagon which in return is``// incsribed within an equilateral triangle``using` `System;` `class` `GFG``{``    ` `// Function to find the side``// of the square``static` `float` `squareSide(``float` `a)``{` `    ``// Side cannot be negative``    ``if` `(a < 0)``        ``return` `-1;` `    ``// side of the square``    ``float` `x = (0.423f * a);``    ``return` `x;``}` `// Driver code``public` `static` `void` `Main()``{``    ``float` `a = 8;``    ``Console.WriteLine(squareSide(a));``}``}` `// This code is contributed by``// shs`

## PHP

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## Javascript

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Output:
`3.384`

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