import java.util.*;

public class Main {
    public static void main(String[] args) {
        Scanner sc = new Scanner(System.in);
        int T = sc.nextInt();
        double[][]X = new double [T][6];
        double[][]Y = new double [T][6];
        for(int i=0; i<T; i++){
            double ans=0;
            int c=0;
            double [] angle = new double [2];
            for(int j=0; j<6; j++){
                X[i][j]=sc.nextDouble();
                Y[i][j]=sc.nextDouble();
                if(X[i][j]>0 && Y[i][j]>0){
                    angle[c]=Math.toDegrees(Math.atan(X[i][j]/Y[i][j]));
                    c++;
                }
            }
            if(c==1){
                ans=90-angle[0];
            }else{
                ans=90-Math.max(angle[0],angle[1]);
            }
            System.out.println(ans);
        }
    }
}