#define _USE_MATH_DEFINES

#include <iostream>
#include <iomanip>

#include <algorithm>
#include <cmath>

#include <string>
#include <list>
#include <queue>
#include <vector>
#include <complex>
#include <set>

/////////
#define REP(i, x, n) for(int i = x; i < n; i++)
#define rep(i,n) REP(i,0,n)
#define P(p) cout<<(p)<<endl;
/////////
typedef long long LL;
typedef long double LD;
/////////
using namespace::std;
/////////
LD ansLD[5000];
int main(void){
    std::cin.tie(0); 
    std::ios::sync_with_stdio(false);
    std::cout << std::fixed;//
    cout << setprecision(7);//
    
    int T;
	cin>>T;

	LD X[6],Y[6];
	LD X0,Y0;
	LD s50 = 2.0*M_PI*50.0/360;
	for(int Loop=0;Loop<T;++Loop){
		rep(i,6){
			cin>>X[i]>>Y[i];
			if(0<=Y[i] && Y[i] <= sin(s50) &&
				cos(s50) <= X[i]){
				X0 = X[i];
				Y0 = Y[i];
			}
		}
		LD ans = atan2(Y0,X0);
		LD kk = 180/M_PI;
		ansLD[Loop] = ans*kk;
	}
	rep(i,T){
		P( ansLD[i] );
	}
    return 0;
}