/*
No.105 arcの六角ボルト - yukicoder http://yukicoder.me/problems/198
 */
#include <iostream>
#include <iomanip>
#include <cmath>
using namespace std;

const double EPS = 1e-12;
const double PI = 3.141592653589793238463;

int main() {
    int T;
    double x[6], y[6];
    double t50 = PI * 50 / 180, t;

    cin >> T;
    while (T--) {
        for (int i = 0; i < 6; ++i) {
            cin >> x[i] >> y[i];
        }
        for (int i = 0; i < 6; ++i) {
            t = atan2(y[i], x[i]);
            if (-EPS <= t && t < t50) {
                break;
            }
        }

        cout << fixed << setprecision(7)
             << (abs(t) * 180 / PI) << endl;
    }

    return 0;
}