\sqrt{\left(\left(\frac{\left(a + b\right) + c}{2} \cdot \left(\frac{\left(a + b\right) + c}{2} - a\right)\right) \cdot \left(\frac{\left(a + b\right) + c}{2} - b\right)\right) \cdot \left(\frac{\left(a + b\right) + c}{2} - c\right)}double f(double a, double b, double c) {
double r22929 = a;
double r22930 = b;
double r22931 = r22929 + r22930;
double r22932 = c;
double r22933 = r22931 + r22932;
double r22934 = 2.0;
double r22935 = r22933 / r22934;
double r22936 = r22935 - r22929;
double r22937 = r22935 * r22936;
double r22938 = r22935 - r22930;
double r22939 = r22937 * r22938;
double r22940 = r22935 - r22932;
double r22941 = r22939 * r22940;
double r22942 = sqrt(r22941);
return r22942;
}