# -*- coding: utf-8 -*-

import math

def main():
    T=int(input())

    for t in range(T):
        input()
        for i in range(6):
            x, y = map(float, input().split())
            if i > 0:
                continue
            d = (math.atan2(y, x) * 180 / math.pi) % 60
            if 0 <= d <= 50:
                print("%.16f"%d)
            else:
                print("0.0000000000000000")


if __name__ == '__main__':
    main()