C Program to find area of equilateral triangle

Program

#include<stdio.h>
#include<math.h>
void main()
{
	int side;
	float area, root;
	printf("Enter the Length of Side:\t");
	scanf("%d", &side);
	root = sqrt(3) / 4;
	area = root * side * side;
	printf("Area of Equilateral Triangle is %f\n", area);
}

Output

Enter the Length of Side:	11
Area of Equilateral Triangle is 52.394539