#include <cstdio>
#include <cmath>
#include <tuple>

typedef std::pair<double,double> P;

const double EPS = 1e-8;

int main(){
    int T;
    scanf("%d", &T);
    
    while(T--){
        double theta;
        for(int i=0;i<6;i++){
            double x, y;
            scanf("%lf %lf", &x, &y);

            double t = asin(y) * 360.0 / (2.0 * M_PI);
            if(x > -EPS && - EPS < t && t < 50.0 + EPS){
                theta = t;
            }
        }

        printf("%.10f\n", theta);
    }
}