from collections import *
from itertools import *
from functools import *
from heapq import *
import sys,math
input = sys.stdin.readline

def answer():
    input()
    XY = [tuple(map(float,input().split())) for _ in range(6)]
    cand = []
    for x,y in XY:
        if (x>=0)&(y>=0):
            cand.append((x,y))
    cand.sort()
    x,y = cand[-1]
    tmp = math.degrees(math.atan2(y,x))
    if tmp >=50:
        print(0)
    else:
        print(tmp)
for _ in range(int(input())):
    answer()