#include <bits/stdc++.h>
using namespace std;

int solve(void) {
	vector<double> X(6), Y(6);
	for(int i = 0; i < 6; ++i) cin >> X[i] >> Y[i];
	
	double ans = 1e9;
	for(int i = 0; i < 6; ++i) {
		double theta = atan2(Y[i], X[i]);
		if(theta < 0) theta += M_PI;
		ans = min(ans, theta * 180 / M_PI);
	}
	
	if(ans > 50) ans = 0;
	cout << ans << "\n";
	
	return 0;
}

int main(void) {
	cout << fixed << setprecision(15);
	
	int T;
	cin >> T;
	
	while(T--) solve();
	
	return 0;
}