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

#define FOR(i,a,b) for(ll i=(a);i<(b);++i)
#define ALL(v) (v).begin(), (v).end()
#define p(s) cout<<(s)<<endl
#define p2(s, t) cout << (s) << " " << (t) << endl
#define br() p("")
#define pn(s) cout << (#s) << " " << (s) << endl
#define p_yes() p("Yes")
#define p_no() p("No")

const ll mod = 1e9 + 7;
const ll inf = 1e18;

#define LOCAL
#ifdef LOCAL
#define show(x) cerr << __LINE__ << " : " << #x << " = " << (x) << endl
#else
#define show(x) true
#endif

template < typename T >
void vprint(T &V){
	for(auto v : V){
    	cout << v << " ";
	}
	cout << endl;
}

double f(double x, double y){
    double rad = acos(x);
    double degree = rad * 180.0 / M_PI;
    return degree;
}

int main(){
    cin.tie(0);
    ios::sync_with_stdio(false);

    // input
    ll T;
    cin >> T;

    FOR(t, 0, T){
        double max_x;
        double max_y;
        FOR(i, 0, 6){
            double x, y;
            y += 0.000000000001;
            cin >> x >> y;
            if(y>0){
                if(x > max_x){
                    max_x = x;
                    max_y = y;
                }
            }
        }

        double angle = f(max_x, max_y);
        cout << setprecision(20);
        p(angle);
    }
    
    return 0;
}