import java.util.*;

public class Main {
    public static void main(String[] args) throws Exception {
       
        Scanner sc = new Scanner(System.in);
        
        int T = sc.nextInt();
        
        for(int i = 0 ; i < T ; i++){
            
            double misalignment_x = 0.0;
            double misalignment_y = 0.0;
            
            for(int j = 0 ; j < 6 ; j++){
                
                double x = sc.nextDouble();
                double y = sc.nextDouble();
                
                if(x >= 0.6 && (y <= 0.8 && y >= 0)){
                    misalignment_x = x;
                    misalignment_y = y;
                }
                 
            }
            
            double distanc_x = misalignment_x;
            double distanc_y = misalignment_y;
            
            double misalignment_angle = Math.atan2(distanc_y , distanc_x) * (180 / Math.PI);
            
            //double test_x = 0.9636066231574117;
           // double test_y = 0.2673242895944358;
            
            //double misalignment_angle = Math.atan2(test_y , test_x) * (180 / Math.PI);
            
            System.out.println(misalignment_angle);
            
        }
        
    }
}