import java.util.*;

public class Main {
  public static void main(String[] args) {
    Scanner sc = new Scanner(System.in);
    int t = sc.nextInt();
    for(int i = 0; i < t; i++) {
      double x0 = 0;
      double y0 = 0;
      for(int j = 0; j < 6; j++) {
        double x = sc.nextDouble();
        double y = sc.nextDouble();
        if((x <= 1) && (x > (1 / 2)) && (y > 0)) {
          x0 = x;
          y0 = y;
        }
      }
      double p = Math.toDegrees(Math.asin(y0));
      System.out.println(p);
    }
  }
}