# Program to Calculate the Perimeter of a Decagon

Given side of a Decagon, the task is to find out the Perimeter of the Decagon.

Explanation : In geometry, a decagon is a ten-sided polygon or 10-gon. A regular decagon has all sides of equal length and each internal angle will always be equal to 144 degrees.

Examples:

Input : S = 5
Output : The Perimeter of Decagon is : 50

Input : S = 8
Output : The Perimeter of Decagon is : 80

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

The formula for finding the Perimeter of the Decagon is:

Perimeter = 10 * S

where "S" is the side of the Decagon

Below is the program to find perimeter of decagon:

## C++

 // C++ program to Calculate the Perimeter of a Decagon #include using namespace std;    // Function for finding the perimeter void CalPeri() {     int s = 5, Perimeter;        Perimeter = 10 * s;        cout << "The Perimeter of Decagon is : "                                 << Perimeter; }    // Driver code int main() {     CalPeri();        return 0; }

## C

 // C program to Calculate the Perimeter of a Decagon #include    // Function for finding the perimeter void CalPeri() {     int s = 5, Perimeter;        Perimeter = 10 * s;        printf("The Perimeter of Decagon is : %d",                                      Perimeter); }    // Driver code int main() {     CalPeri();        return 0; }

## Java

 /*package whatever //do not write package name here */ // Java program to Calculate the Perimeter of a Decagon    import java.io.*;    class GFG {    // Function for finding the perimeter  static void CalPeri()  {      int S = 5, Perimeter;         Perimeter = 10 * S;         System.out.println("The Perimeter of Decagon is : "+                                 Perimeter);  }     // Driver code      public static void main (String[] args) {             CalPeri();     } } //This Code is contributed by ajit

## Python3

 # Python3 program to Calculate  # the Perimeter of a Decagon    # Function for finding the  # perimeter def CalPeri():     s = 5     Perimeter = 10 * s        print ("The Perimeter of Decagon is : "            , Perimeter)     # Driver code if __name__ == '__main__':     CalPeri();    # This code is contributed by # Surendra_Gangwar

## C#

 // C# program to Calculate the  // Perimeter of a Decagon using System;    class GFG {    // Function for finding the perimeter  static void CalPeri()  {      int S = 5, Perimeter;         Perimeter = 10 * S;         Console.WriteLine("The Perimeter of " +                             "Decagon is : "+                                 Perimeter);  }     // Driver code  public static void Main ()  {     CalPeri(); } }    // This Code is contributed  // by anuj_67

## PHP



Output:

The Perimeter of Decagon is : 50

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Improved By : jit_t, vt_m, SURENDRA_GANGWAR