C program for area of equilateral triangle

C program for area of equilateral triangle

C code:

#include<stdio.h>

#include<math.h>

int main(){

    float a;

    float area;

    printf("Enter size of side of the equilateral triangle : ");

    scanf("%f",&a);

    area = sqrt(3)/4*(a*a);

    printf("Area of equilateral triangle is: %.3f",area);

    return 0;

}

Sample output:

Enter size of side of the equilateral triangle: 5

Area of equilateral triangle is: 10.825

 

Formula of area of equilateral triangle:

Area = (√3)/4 * a²