import math
T = int(input())
eps = 10**(-12)
for t in range(T):
    blank = input()
    x, y = 1, 0
    for i in range(6):
        xi, yi = map(float, input().split())
        if xi > 0.5 and yi >= - eps:
            x, y = xi, yi
    theta = (180 * math.atan2(y, x) / math.pi)
    if theta > 55 or theta < 0:
    	theta = 0
    print(format(theta, '.9f'))