n = int(input())
for i in range(n):
    input()
    for i in range(6):
        x, y = [ float(v) for v in input().split() ]
        if x >= 0 and y >= 0:
            d = math.atan2(y, x) * (180/math.pi)
            if 50 >= d >= 0:
                print(d)