Area of Triangle

#include <stdio.h>
#include <math.h>

float triangleArea (float a ,float b,float c);

int main(void) {
    float a , b, c ; 
    scanf("%f %f %f", &a , &b, &c);
    printf("your area %f" , triangleArea( a , b, c));
    return 0;
}

float triangleArea (float a ,float b,float c) {
    float s  = (a + b + c) / 2 ;
    float m =  s *(s- a) * (s -b) * (s -c) ;
    return pow(m , .5) ;
    
}