#include <bits/stdc++.h>
using namespace std;
typedef long long ll;
typedef double D;
typedef complex<D> P;
#define REP(i, n)           for(int(i)=0;(i)<(n);++(i))
const double EPS = 1e-9;
const int MOD = 1000000007;

int main(){
    int T;
    cin >> T;
    REP(t,T){
        P p[6];
        double x,y;
        REP(i,6){
            cin >> x >> y;
            p[i] = P(x,y);
        }

        double minv = 360.;
        REP(i,6){
            double a = arg(p[i])*180/3.14159265358979323;
            if(a > -EPS){
                minv = min(minv, a);
            }
        }
        cout << fixed << setprecision(16) << minv << endl;
    }
    return 0;
}