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Program to calculate area of Enneagon
An enneagon also known as nonagon is a polygon with 9 sides. To calculate the area of enneagon the following formula is used,
Area of ennagon = ((a2*9) / 4*tan (20°)) ∼= (6.18 * a2)
Code Logic, The area of a polygon with nine sides is calculated by using the formula, ((a2*9) / 4*tan (20°)) ∼= (6.18 * a2). The value 6.18 is filled into a float variable called multiplier, this value then multiplied by the square of side of enneagon.
Example
#include <stdio.h>
#include <math.h>
int main(){
int a = 6;
float area;
float multiplier = 6.18;
printf("Program to find area of Enneagon
");
printf("The side of the Enneagon is %d
", a);
area = (6.18 * a * a);
printf("The area of Enneagon is %f
", area);
return 0;
}Output
Program to find area of Enneagon The side of the Enneagon is 6 The area of Enneagon is 222.479996
Updated on: 30-Jul-2019
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