#include <cstdio>
#include <iostream>
#include <sstream>
#include <fstream>
#include <iomanip>
#include <algorithm>
#include <cmath>
#include <string>
#include <vector>
#include <list>
#include <queue>
#include <stack>
#include <set>
#include <map>
#include <bitset>
#include <numeric>
#include <limits>
#include <climits>
#include <cfloat>
#include <functional>
using namespace std;

const double PI = acos(-1.0);
const double EPS = 1.0e-10;

int main()
{
    int n;
    cin >> n;

    while(--n >= 0){
        double ret = DBL_MAX;
        for(int i=0; i<6; ++i){
            double x, y;
            cin >> x >> y;
            x += EPS;
            y += EPS;
            double theta = atan2(y, x);
            if(theta >= 0.0)
                ret = min(ret, theta);
        }

        printf("%.10f\n", ret / PI * 180);
    }

    return 0;
}