from math import *

T = int(input())
for _ in range(T):
    ans = 0
    input()
    for i in range(6):
        X, Y = map(float, input().split())
        if X >= 1:
            X = 1
        elif X <= -1:
            X = -1
        if Y >= 1:
            Y = 1
        elif Y <= -1:
            Y = -1  
        x = degrees(acos(X)) - 60
        y = degrees(asin(Y)) - 60
        if 0 <= x <= 50 and 0 <= y <= 50:
            ans = x
    print(ans)