from math import atan2
from math import degrees

T=int(input())
for tests in range(T):
    _=input()

    X=[tuple(map(float,input().split())) for i in range(6)]

    Y=[]
    for x,y in X:
        Y.append(degrees(atan2(y,x)))

    #print(Y)
    ANS=50

    for y in Y:
        if -10**(-6)<=y<ANS:
            ANS=y

    print(ANS)