Find length of Diagonal of Hexagon

• Last Updated : 18 Mar, 2021

Given a regular hexagon of side length a, the task is to find the length of it’s diagonal.
Examples

Input : a = 4
Output : 8

Input : a = 7
Output : 14 From the diagram, it is clear that the triangle ABC is an equilateral triangle, so
AB = AC = BC = a.
also it is obvious, diagonal = 2*AC or 2*BC
So the length of diagonal of the hexagon = 2*a
Below is the implementation of the above approach:

C++

 // C++ Program to find the diagonal// of the hexagon#include using namespace std; // Function to find the diagonal// of the hexagonfloat hexadiagonal(float a){    // side cannot be negative    if (a < 0)        return -1;     // diagonal of the hexagon    return 2 * a;} // Driver codeint main(){    float a = 4;     cout << hexadiagonal(a) << endl;     return 0;}

Java

 // Java Program to find the diagonal// of the hexagon import java.io.*; class GFG { // Function to find the diagonal// of the hexagonstatic float hexadiagonal(float a){    // side cannot be negative    if (a < 0)        return -1;     // diagonal of the hexagon    return 2 * a;} // Driver code      public static void main (String[] args) {            float a = 4;     System.out.print( hexadiagonal(a));}} // This code is contributed// by shs

Python3

 # Python3 Program to find the diagonal# of the hexagon # Function to find the diagonal# of the hexagondef hexadiagonal(a):     # side cannot be negative    if (a < 0):        return -1     # diagonal of the hexagon    return 2 * a  # Driver codeif __name__=='__main__':    a = 4    print(hexadiagonal(a)) # This code is contributed by# Shivi_Aggarwal

C#

 // C# Program to find the diagonal// of the hexagonusing System; class GFG {     // Function to find the diagonal    // of the hexagon    static float hexadiagonal(float a)    {        // side cannot be negative        if (a < 0)            return -1;                 // diagonal of the hexagon        return 2 * a;    } // Driver codepublic static void Main(){   float a = 4;   Console.WriteLine( hexadiagonal(a));}} // This code is contributed// by anuj_67..



Javascript


Output:
8

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