#include <iostream>
#include <algorithm>
#include <cmath>
#include <iomanip>
using namespace std;
typedef long long ll;
static const double pi = 3.14159265358979265358979;
int main(){
  int t;
  double x,y;
  cin>>t;
  double a,b,c,d,e;
  a=1/2;
  b=sqrt(3)/2;
  ll z;
  b*=1e12;
  z=b;
  b=z/1e12;
  for(int i=0; i<t; ++i){
    for(int j=0; j<6; ++j){
      cin>>x>>y;
      x*=1e12;
      z=x;
      x=z/1e12;
      y*=1e12;
      z=y;
      y=z/1e12;
      if(x<=1 && x>a && y>=0 && y<b){
        c=y;
        d=c/1;
      }
    }
    e=asin(d);
    e*=(180/pi);
    cout<<fixed<<setprecision(12)<<e<<endl;
  }
  return 0;
}