Program to calculate Area Of Octagon

An octagon is a polygon with eight sides. To calculate the area of octagon the following formula is used,

Area of octagon = ((a2*2) / *tan (22.5°)) = ((2*a*a)(1+√2))

Code Logic, The area of a polygon with eight side is calculated by using the above formula. The expression uses sqrt function to find the square root of 2. The value of expression is evaluated as a floating point value that is put into the float area variable.


 Live Demo

#include <stdio.h>
#include <math.h>
int main(){
   int a = 7;
   float area;
   float multiplier = 6.18;
   printf("Program to find area of octagon 
");    printf("The side of the octagon is %d
", a);    area = ((2*a*a)*(1 + sqrt(2)));    printf("The area of Enneagon is %f
", area);    return 0; }


Program to find area of octagon
The side of the octagon is 7
The area of Enneagon is 236.592926
Sharon Christine
Sharon Christine

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