#include <iostream>
#include <iomanip>
#include <algorithm>
#include <cmath>

using namespace std;

const double PI = acos(-1);

double angle(const double x[], const double y[]) {
	const double MAX_ERROR = 1e-6;
	double theta[6];
	for (int i = 0; i < 6; ++i) {
		theta[i] = fmod(atan2(y[i], x[i]) + MAX_ERROR + 2 * PI, 2 * PI);
	}
	sort(&theta[0], &theta[5] + 1);
	return (theta[0] - MAX_ERROR) * 180 / PI;
}

int main() {
	int t;
	cin >> t;
	for (int i = 0; i < t; ++i) {
		double x[6], y[6];
		for (int k = 0; k < 6; ++k) {
			cin >> x[k] >> y[k];
		}
		double result = angle(x, y);
		cout << fixed << setprecision(12) << result << endl;
	}
	return 0;
}