#include<bits/stdc++.h>
using namespace std;

#define int long long

typedef pair<int,int>pint;
typedef vector<int>vint;
typedef vector<pint>vpint;
#define pb push_back
#define mp make_pair
#define fi first
#define se second
#define all(v) (v).begin(),(v).end()
#define rep(i,n) for(int i=0;i<(n);i++)
#define reps(i,f,n) for(int i=(f);i<(n);i++)
#define each(it,v) for(__typeof((v).begin()) it=(v).begin();it!=(v).end();it++)
template<class T,class U>void chmin(T &t,U f){if(t>f)t=f;}
template<class T,class U>void chmax(T &t,U f){if(t<f)t=f;}

const double EPS=1e-7;
const double PI=acos(-1);
double X[6],Y[6];
//90=PI/2
double torad(double d){
    return PI/180*d;
}
double todeg(double t){
    return 180.0/PI*t;
}

void solve(){
    rep(i,6)cin>>X[i]>>Y[i];

    rep(i,6){
        if(X[i]<-EPS||Y[i]<-EPS)continue;

        double t=asin(Y[i]);
        if(t>torad(55))continue;
        printf("%.20lf\n",todeg(t));
        return;
    }
}

signed main(){
    int T;cin>>T;while(T--)solve();
    return 0;
}