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

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;
			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));}
}

namespace myComplex{
	struct Complex{
		double re;
		double im;
		public static Complex I=new Complex(0,1);
		public double Re{
			get{return this.re;}
			set{this.re=value;}
		}
		public double Im{
			get{return this.im;}
			set{this.im=value;}
		}
		public Complex(double a,double b){
			re=a;im=b;
		}
		
		public static implicit operator Complex(double a){
			return new Complex(a,0);
		}
		public static Complex operator+(Complex a,Complex b){
			return new Complex(a.Re+b.Re,a.Im+b.Im);
		}
		public static Complex operator-(Complex a,Complex b){
			return new Complex(a.Re-b.Re,a.Im-b.Im);
		}
		public static Complex operator*(Complex a,Complex b){
			return new Complex(a.Re*b.Re-a.Im*b.Im,a.Re*b.Im+a.Im*b.Re);
		}
		public static Complex operator/(Complex a,Complex b){
			return a*(1.0/b.Abs2)*~b;
		}
		public static Complex operator~(Complex a){
			return new Complex(a.Re,-a.Im);
		}
		public double Abs{
			get{return Math.Sqrt(this.Abs2);}
		}
		public double Abs2{
			get{return re*re+im*im;}
		}
		public double Arg{
			get{return Math.Atan2(im,re);}
		}
		public override String ToString(){
			return this.Re.ToString()+","+this.Im.ToString();
		}
		public static Complex Exp(Complex a){
			return Math.Exp(a.Re)*(new Complex(Math.Cos(a.Im),Math.Sin(a.Im)));
		}
	}
}