using System;
using System.Collections;
using System.Collections.Generic;

class TEST{
	static void Main(){
		Sol mySol =new Sol();
		mySol.Solve();
	}
}

class Sol{
	public void Solve(){
		double eps=1e-12;
		for(;T>0;T--){
			List<Pair> L=new List<Pair>();
			rs();
			for(int i=0;i<6;i++){
				var d=rda();
				L.Add(new Pair(d[0],d[1]));
			}
			L.Sort((x,y)=>(x.X>y.X?-1:x.X<y.X?1:0));
			if(Math.Abs(L[0].X-L[1].X)<eps){
				Console.WriteLine(30);
				continue;
			}
			if(L[0].Y>-eps){
				double ans=Math.Atan2(L[0].Y,L[0].X)*180.0/Math.PI;
				Console.WriteLine(ans);
				continue;
			}
			double ans2=60+Math.Atan2(L[0].Y,L[0].X)*180.0/Math.PI;
			if(Math.Abs(ans2-60)<eps)ans2=0.0;
			Console.WriteLine(ans2);
		}
		
	}
	int T;
	public Sol(){
		T=ri();
	}

	class Pair{
		public double X;
		public double Y;
		public Pair(double x_,double y_){
			X=x_;Y=y_;
		}
	}

	static String rs(){return Console.ReadLine();}
	static int ri(){return int.Parse(Console.ReadLine());}
	static long rl(){return long.Parse(Console.ReadLine());}
	static double rd(){return double.Parse(Console.ReadLine());}
	static String[] rsa(){return Console.ReadLine().Split(' ');}
	static int[] ria(){return Array.ConvertAll(Console.ReadLine().Split(' '),e=>int.Parse(e));}
	static long[] rla(){return Array.ConvertAll(Console.ReadLine().Split(' '),e=>long.Parse(e));}
	static double[] rda(){return Array.ConvertAll(Console.ReadLine().Split(' '),e=>double.Parse(e));}
}