import sys
read=sys.stdin.buffer.read
readline=sys.stdin.readline

from math import atan2, pi
from decimal import Decimal, getcontext
getcontext().prec=30
for _ in range(int(readline())):
  readline()
  XY=[tuple(map(Decimal, readline().rstrip().split())) for _ in range(6)]
  theta=min(atan2(y, x) for x,y in XY if atan2(y, x)>-1e-9)*180/pi
  print("{:.16f}".format(theta))