#include <sstream>
#include <string>
#include <vector>
#include <map>
#include <algorithm>
#include <iostream>
#include <utility>
#include <set>
#include <cctype>
#include <queue>
#include <stack>
#include <cstdio>
#include <cstdlib>
#include <cmath>

#define INF 1000000000

using namespace std;
typedef long long ll;

int main(void) {
    int T;
    cin >> T;
    while (T--) {
        double x[6];
        double y[6];
        double ret = 0;
        for (int i = 0; i < 6; i++) {
            cin >> x[i] >> y[i];
            double ans = acos(x[i]);
            ans = ans / M_PI * 180;
            if (0 <= ans && ans <= 50 && y[i] >= 0) ret = ans;
        }
        printf("%.10lf\n", ret);
    }
    return 0;
}