#include <algorithm>
#include <complex>
#include <cstdlib>
#include <iomanip>
#include <iostream>
#include <vector>


constexpr double PI = 3.14159265358979323846;


template <typename T> T compute_angle(std::vector<std::complex<T>>& points) {
	std::vector<T> arguments;
	for (auto point : points) {
		arguments.push_back(std::arg(point));
	}
	T minimum_argument = *std::min_element(arguments.begin(), arguments.end());
	T answer = (minimum_argument + PI) * 180.0 / PI;
	if (answer > 55.0) {
		return 0.0;
	}
	else {
		return answer;
	}
}


int main()
{
	unsigned int t;
	std::cin >> t;
	for (unsigned int i = 0; i < t; i++) {
		std::vector<std::complex<double>> points;
		for (unsigned int j = 0; j < 6; j++) {
			double x, y;
			std::cin >> x >> y;
			std::complex<double> point(x, y);
			points.push_back(point);
		}
		std::cout << std::fixed << std::setprecision(16) << compute_angle<double>(points) << std::endl;
	}

	return EXIT_SUCCESS;
}