#include <atcoder/all>
#include <bits/stdc++.h>
using namespace std;
using namespace atcoder;
#define rep(i, n) REP(i, 0, n)
#define REP(i, s, e) for (ll i = (s); i < (ll)(e); i++)
#define repr(i, n) REPR(i, n, 0)
#define REPR(i, s, e) for (ll i = (ll)(s - 1); i >= (ll)(e); i--)
#define all(r) r.begin(), r.end()
#define rall(r) r.rbegin(), r.rend()

typedef long long ll;
typedef vector<int> vi;
typedef vector<ll> vl;

template <typename T, typename U>
bool chmax(T& a, const U& b) {
    if (a >= b) return false;
    a = b;
    return true;
}
template <typename T, typename U>
bool chmin(T& a, const U& b) {
    if (a <= b) return false;
    a = b;
    return true;
}

void yes_no(bool f, string yes = "Yes", string no = "No") {
    cout << (f ? yes : no) << "\n";
}
//----------基本部分-----------------------------------------------------------------------
#define X real()
#define Y imag()
#define x(p) real(p)
#define y(p) imag(p)
#define curr(P, i) P[i]
#define next(P, i) P[(i + 1) % P.size()]
#define prev(P, i) P[(i + P.size() - 1) % P.size()]

using D = long double;

const D EPS = 1e-8;
const D INF = 1e12;
const D PI = acos(-1);
typedef complex<D> P;
typedef complex<D> point;
namespace std {
bool operator<(const P& a, const P& b) {
    return x(a) != x(b) ? x(a) < x(b) : y(a) < y(b);
}
} // namespace std
D cross(const P& a, const P& b) {
    return y(conj(a) * b);
}
D dot(const P& a, const P& b) {
    return x(conj(a) * b);
}

struct L : public vector<P> {
    L(const P& a, const P& b) {
        push_back(a);
        push_back(b);
    }
};

typedef vector<P> G;
typedef vector<P> polygon;

struct C {
    P p;
    D r;
    C(const P& p, D r) : p(p), r(r) {}
};
// 点の進行方向
int ccw(P a, P b, P c) {
    b -= a;
    c -= a;
    if (cross(b, c) > 0) return +1;   // counter clockwise
    if (cross(b, c) < 0) return -1;   // clockwise
    if (dot(b, c) < 0) return +2;     // c--a--b on line
    if (norm(b) < norm(c)) return -2; // a--b--c on line
    return 0;
}

//
// 凸包 - convex hull  同一直線上の点は除去（除去したくない場合は、ccw(...)<=0 ==> ccw(...)!=-1)             CGL_4_A
vector<point> convex_hull(vector<point> ps) {
    int n = ps.size(), k = 0;
    sort(ps.begin(), ps.end());
    vector<point> ch(2 * n);
    for (int i = 0; i < n; ch[k++] = ps[i++]) // lower-hull
        while (k >= 2 && ccw(ch[k - 2], ch[k - 1], ps[i]) <= 0) --k;
    for (int i = n - 2, t = k + 1; i >= 0; ch[k++] = ps[i--]) // upper-hull
        while (k >= t && ccw(ch[k - 2], ch[k - 1], ps[i]) <= 0) --k;
    ch.resize(k - 1);
    return ch;
}

void solve() {
    const int n = 6;
    vector<P> ps;
    rep(i, n) {
        D x, y;
        cin >> x >> y;
        ps.emplace_back(x, y);
    }
    const D pi = acosl(-1);
    D SUP = 50;
    P a{-1, 0};
    rep(i, n) {
        P p = ps[i] / a;
        D arg = atan2(p.Y, p.X) * 180 / pi;
        if (arg > -EPS && arg < SUP) {
            cout << fixed << setprecision(15);
            cout << arg << '\n';
            return;
        }
    }
}

int main() {
    cin.tie(0);
    ios::sync_with_stdio(false);
    int t = 1;
    cin >> t;
    rep(ti, t) solve();
    return 0;
}