#include <iostream>
#include <algorithm>
#include <vector>
#include <string>
#include <cmath>
#include <iomanip>
#include <map>
#include <cmath>
using namespace std;
typedef long long LL;

int main(){
    int t;
    cin >> t;
    for(int i = 0; i < t; i++){
        double x[6], y[6];
        double ans = M_PI;
        for(int j = 0; j < 6; j++){
            cin >> x[j] >> y[j];
            double a = atan2(y[j], x[j]);
            if(a >= -1.0e-10) ans = min(ans, a);
        }
        cout << fixed << setprecision(13) << ans*180/M_PI << endl;
    }
    return 0;
}