#include <bits/stdc++.h>
using namespace std;

int main() {
    int T;
    cin >> T;
    while (T--) {
        vector<pair<double, double>> V;
        double SUMX = 0, SUMY = 0;
        for (int i = 0; i < 6; i++) {
            double X, Y;
            cin >> X >> Y;
            V.push_back({X, Y});
            SUMX += X;
            SUMY += Y;
        }
        SUMX /= 6;
        SUMY /= 6;
        double ans = 0;
        for (int i = 0; i < 6; i++) {
            double X = V[i].first - SUMX;
            double Y = V[i].second - SUMY;
            double theta = atan2(Y, X);
            theta *= 180.0 / M_PI;
            if (theta > -5 && theta < 55) {
                ans = theta;
                break;
            }
        }
        cout << fixed << setprecision(10) << ans << endl;
    }
}