#include <vector>
#include <list>
#include <map>
#include <set>
#include <deque>
#include <stack>
#include <queue>
#include <bitset>
#include <algorithm>
#include <functional>
#include <numeric>
#include <utility>
#include <sstream>
#include <iostream>
#include <iomanip>
#include <cstdio>
#include <cmath>
#include <cstdlib>
#include <cctype>
#include <string>
#include <cstring>
#include <ctime>

using namespace std;

typedef long long ll;
typedef unsigned long long ull;

static const double EPS = 1e-8;
static const double PI = 4.0 * atan(1.0);
static const double PI2 = 8.0 * atan(1.0);

#define REP(i,n)	for(int i=0;i<(int)n;++i)
#define ALL(c)		(c).begin(),(c).end()
#define CLEAR(v)	memset(v,0,sizeof(v))
#define MP(a,b)		make_pair((a),(b))
#define ABS(a)		((a)>0?(a):-(a))
#define FOR(i,s,n)	for(int i=s;i<(int)n;++i)

#define eps (1e-12)

double X[6], Y[6], rad[6];

void solve() {
	REP(i, 6) rad[i] = atan2(Y[i], X[i]);
	REP(i, 6) if (rad[i] >= PI * 60 / 180 - 0.1 && rad[i] <= PI * 110 / 180 + 0.1) {
		double res = (rad[i] - PI / 3) / PI * 180;
		if (res > 50.1) res -= 60;
		if (res < -50.1) res += 60;
		cout << fixed << setprecision(8) << res << endl;
	}
}

int main(int argc, char **argv) {
	int T;
	cin >> T;
	REP(i, T) {
		REP(j, 6) cin >> X[j] >> Y[j];
		solve();
	}
	return 0;
}