#if defined(__GNUG__) && !defined(__clang__)
#include <bits/stdc++.h>
#endif

#define inf(T) (numeric_limits<T>::min())
#define sup(T) (numeric_limits<T>::max())
#define rep(i,n) for (int i = 0; i < (n); i++)
#define asc(c) (c).begin(), (c).end()
#define desc(c) (c).rbegin(), (c).rend()
#define mp(...) make_pair(__VA_ARGS__)
#define mt(...) make_tuple(__VA_ARGS__)

using namespace std;

using ll = long long;
using ld = long double;

template <class Key>          using uset = unordered_set<Key>;
template <class Key, class T> using umap = unordered_map<Key, T>;

int main()
{
  cin.tie(0);
  ios::sync_with_stdio(false);

  int t;
  cin >> t;
  ld pi = 4 * atan(1l);
  while (t--) {
    ld x = 0, y;
    rep(i,6) {
      ld xi, yi;
      cin >> xi >> yi;
      if (yi >= 0 && xi > x) {
        x = xi;
        y = yi;
      }
    }
    ld arc = atan2(y, x) / pi * 180;
    if (arc >= 55) arc -= 60;
    cout << fixed << setprecision(6) << arc << endl;
  }

  return 0;
}