#include <iostream>
#include <cstdio>
#include <vector>
#include <algorithm>
#include <utility>
#include <cmath>

using namespace std;

const double EPS = 1e-12;

int main() {
	int t;
	double in_x, in_y, x, y;

	cin >> t;
	vector<double> ans(t, 0.0);
	for (int i = 0; i < t; i++) {
		x = -100;
		for (int i = 0; i < 6; i++) {
			cin >> in_x >> in_y;

			if (in_y >= -EPS && in_x > x) {
				x = in_x;
				y = in_y;
			}
		}

		double diff = x == 0 ? 0 : atan(y / x) * 180 / M_PI;
		ans[i] = diff;
	}

	for (int i = 0; i < t; i++) {
		printf("%.16f\n", ans[i]);
	}
	return 0;
}