# Program for Surface Area of Octahedron

Given the sides of Octahedron then calculate the surface area.

Examples:

```Input  : 7
Output : 169.741

Input  : 9
Output : 280.59
```

## Recommended: Please try your approach on {IDE} first, before moving on to the solution.

An regular octahedron has eight faces, which are all in the shape of equilateral triangles.The area of an octahedron is 2 multiplied by the length of an edge squared multiplied by the square root of three.

Formula:
Surface area= 2*(sqrt(3))*(side*side)

## C++

 `// CPP Program to calculate  ` `// surface area of Octahedron ` `#include ` `using` `namespace` `std; ` ` `  `// utility Function ` `double` `surface_area_octahedron(``double` `side) ` `{ ` `    ``return` `(2*(``sqrt``(3))*(side*side)); ` `} ` ` `  `// Driver Function ` `int` `main() ` `{ ` `    ``double` `side = 7; ` `    ``cout << ``"Surface area of octahedron ="` `        ``<< surface_area_octahedron(side) ` `        ``<< endl; ` `} `

## Java

 `// Java Program to calculate  ` `// surface area of Octahedron. ` ` `  `import` `java.io.*; ` `import` `java.util.*; ` ` `  `class` `GFG { ` `     `  `// utility Function ` `static` `double` `surface_area_octahedron(``double` `side) ` `{ ` `    ``return` `(``2``*(Math.sqrt(``3``))*(side*side)); ` `} ` `    ``public` `static` `void` `main (String[] args) { ` `    ``double` `side = ``7``; ` `    ``System.out.println(``"Surface area of octahedron ="` `                    ``+ surface_area_octahedron(side));  ` `     `  `    ``} ` `} ` ` `  `// This code is contributed by Gitanjali. `

## Python3

 `# Python Program to calculate  ` `# surface area of Octahedron. ` `import` `math ` ` `  `# utility Function ` `def` `surface_area_octahedron( side): ` ` `  `    ``return` `(``2``*``(math.sqrt(``3``))``*``(side``*``side)) ` ` `  `# driver code  ` `side ``=` `7` `print``(``"Surface area of octahedron ="` `, ` `      ``surface_area_octahedron(side)) ` ` `  `# This code is contributed by Gitanjali. `

## C#

 `// C# program to calculate ` `// surface area of Octahedron. ` `using` `System; ` ` `  `class` `GFG { ` ` `  `    ``// utility Function ` `    ``static` `double` `surface_area_octahedron(``double` `side) ` `    ``{ ` `        ``return` `(2 * (Math.Sqrt(3)) * (side * side)); ` `    ``} ` `     `  `    ``// Driver code ` `    ``public` `static` `void` `Main() ` `    ``{ ` `        ``double` `side = 7; ` `        ``Console.WriteLine(``"Surface area of octahedron ="` `                        ``+ surface_area_octahedron(side)); ` `    ``} ` `} ` ` `  `// This code is contributed by vt_m. `

## PHP

 ` `

Output:

```Surface area of octahedron =169.741
```