package no105;

import java.util.Scanner;

public class Main {
	public static void main(String[] args) {
		Scanner sc = new Scanner(System.in);
		int t = sc.nextInt();
		for(int tt=0;tt<t;tt++) {
			double arg = 100;
			for(int i=0;i<6;i++) {
				double x = sc.nextDouble();
				double y = sc.nextDouble();
				double atan = Math.atan2(y, x);
				if (atan < 0) {
					atan = 2 * Math.PI - atan;
				}
				arg = Math.min(arg, atan);
			}
			System.out.println(Math.toDegrees(arg));
		}
	}
}