\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 r109056 = a;
double r109057 = b;
double r109058 = r109056 + r109057;
double r109059 = c;
double r109060 = r109058 + r109059;
double r109061 = 2.0;
double r109062 = r109060 / r109061;
double r109063 = r109062 - r109056;
double r109064 = r109062 * r109063;
double r109065 = r109062 - r109057;
double r109066 = r109064 * r109065;
double r109067 = r109062 - r109059;
double r109068 = r109066 * r109067;
double r109069 = sqrt(r109068);
return r109069;
}