\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 r11069 = a;
double r11070 = b;
double r11071 = r11069 + r11070;
double r11072 = c;
double r11073 = r11071 + r11072;
double r11074 = 2.0;
double r11075 = r11073 / r11074;
double r11076 = r11075 - r11069;
double r11077 = r11075 * r11076;
double r11078 = r11075 - r11070;
double r11079 = r11077 * r11078;
double r11080 = r11075 - r11072;
double r11081 = r11079 * r11080;
double r11082 = sqrt(r11081);
return r11082;
}