#include <bits/stdc++.h>

using namespace std;

#define REP(i,a,b) for(int i=a;i<(int)b;i++)
#define rep(i,n) REP(i,0,n)

int main() {

  int Tc; cin >> Tc;
  while(Tc--) {
    double ans = 1e20;
    rep(i, 6) {
      double x, y; cin >> x >> y;
      double rad = atan2(y, x);
      if(rad < 0.) continue;
      ans = min(ans, rad);
    }
    printf("%.10f\n", ans*180./M_PI);
  }
  
  return 0;
}