using System;
using System.Collections;
using System.Collections.Generic;
using System.Collections.Specialized;
using System.Text;
using System.Text.RegularExpressions;
using System.Linq;
using System.IO;

class Program
{
    static private Magatro M = new Magatro();
    static private void Main(string[]args)
    {
        M.Scan();
        M.Solve();
    }
}

public class Scanner
{
    private string[] S;
    private int Index;
    private char Separator;
    public Scanner(char separator = ' ')
    {
        Index = 0;
        Separator = separator;
    }
    private string[] Line()
    {
        return Console.ReadLine().Split(Separator);
    }
    public string Next()
    {
        string result;
        if (S == null || Index >= S.Length)
        {
            S = Line();
            Index = 0;
        }
        result = S[Index];
        Index++;
        return result;
    }
    public int NextInt()
    {
        return int.Parse(Next());
    }
    public double NextDouble()
    {
        return double.Parse(Next());
    }
    public long NextLong()
    {
        return long.Parse(Next());
    }
}

public class Magatro
{
    private Scanner sc = new Scanner();
    private int T;
    private const double RadToAngle = 180.0 / Math.PI;
    private const double m = 5.0;
    private string[] ans;
    public void Scan()
    {
        T = sc.NextInt();
    }
    public void Solve()
    {
        ans = new string[T];
        for(int i = 0; i < T; i++)
        {
            sc.Next();
            ans[i]=Bolt().ToString("0.############");
        }
        Console.WriteLine(string.Join("\n", ans));
    }
    private double Bolt()
    {
        double y=-1, x=-1;
       for(int i = 0; i < 6; i++)
        {
            if (i == 0)
            {
                x = sc.NextDouble();
                y = sc.NextDouble();
            }
            else
            {
                sc.Next();
                sc.Next();
            }
        }
        double yurumi = Math.Atan2(y, x)*RadToAngle+360.0;

        while (yurumi > 55) yurumi -= 60.0;
        if (yurumi < 0) return 0;
        return yurumi;
    }
}