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 = 6Output:2.538Input:a = 8Output: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 <bits/stdc++.h>` `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

`<?php` `// PHP 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` `function` `squareSide(` `$a` `)` `{` ` ` `// Side cannot be negative` ` ` `if` `(` `$a` `< 0)` ` ` `return` `-1;` ` ` `// side of the square` ` ` `$x` `= 0.423 * ` `$a` `;` ` ` `return` `$x` `;` `}` `// Driver code` `$a` `= 8;` `echo` `squareSide(` `$a` `);` `// This code is contributed by ajit.` `?>` |

## Javascript

`<script>` `// javascript 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` `function` `squareSide(a)` `{` ` ` `// Side cannot be negative` ` ` `if` `(a < 0)` ` ` `return` `-1;` ` ` `// side of the square` ` ` `var` `x = (0.423 * a);` ` ` `return` `x;` `}` `// Driver code` `var` `a = 8;` `document.write(squareSide(a));` `// This code is contributed by Princi Singh` `</script>` |

**Output:**

3.384

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