Program to find the Area of a Pentagon in C++

In this problem, we are given a number n that denotes that side of the pentagon. Our task is to create a program to find the Area of a Pentagon in C++.

Pentagon is a five-sided geometric figure.

Regular pentagon is a pentagon with all five sides and angles equal.

Let’s take an example to understand the problem,

Input

a = 7

Output

84.3

Program to illustrate the working of our solution,

Example

 Live Demo

#include <iostream>
using namespace std;
float calcpentagonArea(int a){
   return ( ((6.8819)*a*a)/4);
}
int main() {
   int a = 7;
   cout<<"The area of regular pentagon of side "<<a<<" is"<<calcpentagonArea(a);
   return 0;
}

Output

The area of regular pentagon of side 7 is 84.3033