import java.util.*;

public class Main {
    public static void main(String[] args) {
        Scanner sc = new Scanner(System.in);
        int T = sc.nextInt();
        for(int n=0; n<T; n++){
            double ans=0;
            for(int i=0; i<6; i++){
                double X = sc.nextDouble();
                double Y = sc.nextDouble();
                double angle = Math.toDegrees(Math.atan(Y/X));
                if(angle>=0&&angle<=50){
                    ans=angle;
                }
            }
            System.out.println(ans);
        }
    }
}