struct point{
  double x,y;
};
double c(point a, double r1, point b, double r2,double t)
{
  double d = sqrt((a.x-b.x)*(a.x-b.x) + (a.y-b.y)*(a.y-b.y));
  if (d >= r1+r2)
    return 0;
  //if(d==r1+r2) return t*t;
  if (r1>r2){
    double tmp = r1;
    r1 = r2;
    r2 = tmp;
  }
  if(r2 - r1 >= d)
    return pi*r1*r1;
  double g1=acos((r1*r1+d*d-r2*r2)/(2*r1*d));
  double g2=acos((r2*r2+d*d-r1*r1)/(2*r2*d));
  return g1*r1*r1 + g2*r2*r2 - r1*d*sin(g1);
}
int main(){
  int _=read;
  while(_--){
    double x1,y1,r1,x2,y2,r2,a;
    cin>>r1>>x1>>y1>>r2>>x2>>y2>>a;
    if(r2*r2-a*a/4<=0) puts("0.000000");
    else{
      double R1=sqrt(r1*r1-a*a/4)-a/2;
      double R2=sqrt(r2*r2-a*a/4)-a/2;
      //cout<<R1<<" "<<R2<<endl;
      point t1={x1,y1},t2={x2,y2};
      printf("%.6f\n",c(t1,R1,t2,R2,a)/(pi*R1*R1));
    }
  }
  return 0;
}