write a program to find radius of circum-circle in a equilateral triangle of given side.

#include<stdio.h>
main()
{
float a,circumcircle;
printf("enter the side of equilateral triangle:");
scanf("%f",&a);
circumcircle=a/1.73;
printf("radius of circumcircle of a equilateral triangle of side a:%f",circumcircle);
}