#include "bits/stdc++.h"
#define REP(i,n,N) for(ll i=(n); i<(N); i++)
#define RREP(i,n,N) for(ll i=(N-1); i>=n; i--)
#define CK(n,a,b) ((a)<=(n)&&(n)<(b))
#define ALL(v) (v).begin(),(v).end()
#define p(s) cout<<(s)<<endl
#define p2(a,b) cout<<(a)<<" "<<(b)<<endl
#define v2(T) vector<vector<T>>
typedef long long ll;
using namespace std;
const ll mod = 1e9+7;


int main() {
    int N; cin>>N;
    double X[6],Y[6];
    REP(i,0,N) {
        double mn = 1;
        int idx;
        REP(i, 0, 6) {
            cin >> X[i] >> Y[i];
            if (1 - X[i] < mn && Y[i]>0) {
                mn = 1 - X[i];
                idx = i;
            }
        }
        double ans = acos(X[idx] / sqrt(X[idx]*X[idx] +  Y[idx]*Y[idx]));
        ans=ans/(2*M_PI)*360;
        if(ans>=50) ans=0;
        printf("%.7lf\n", ans);
    }
    return 0;
}