#define _CRT_SECURE_NO_WARNINGS
#define _USE_MATH_DEFINES
#include <iostream>
#include <map>
#include <list>
#include <cstdio>
#include <cmath>
#include <cstring>
#include <string>
#include <vector>
#include <algorithm>
#include <utility>
#include <queue>
#include <iomanip>

using namespace std;



int main(void)
{
	int T;
	double x, y;
	double res;
	double mi = 10e9;

	cin >> T;

	for (int i = 0; i < T; i++) {
		mi = 10e9;
		for (int j = 0; j < 6; j++) {
			cin >> x >> y;
			if(atan2(y, x) < 0) continue;
			mi = min(mi, atan2(y, x));
		}
		if(mi * 180 / M_PI > 55) mi = 0;
		cout << fixed <<  setprecision(10) << mi * 180 / M_PI << endl;
	}
	
	

	return (0);
}