import numpy as np


def main():
    t = int(input())
    for _ in range(t):
        input()
        points = np.array([list(map(np.float64, input().split())) for _ in range(6)])
        x, y = points[:, 0], points[:, 1]
        res = np.rad2deg(np.arctan2(y, x)) % 60
        res[res > 50] = 0
        print(np.average(res))


if __name__ == "__main__":
    main()