t = int(input())
from itertools import permutations
import math
for i in range(t):
    q = input()
    xy = [list(map(float,input().split())) for _ in range(6)]
    l = [i for i in range(6)]
    m = list(permutations(l))
    q = True
    for j in m:
        p = True
        for k in range(1,6):
            x,y = xy[j[k-1]]
            a,b = xy[j[k]]
            nx = x * math.cos(60*math.pi/180) - y * math.sin(60*math.pi/180)
            ny = x * math.sin(60*math.pi/180) + y * math.cos(60*math.pi/180)
            if (abs(nx-a)<0.1 and abs(ny-b)<0.1):
                continue
            p = False
            break
        if not p:
            continue
        th = math.atan(xy[j[0]][1]/xy[j[0]][0])
        th *= 180/math.pi
        if (0<=th<50):
            print('{:.20f}'.format(th))
            q = False
            break
    if(q):
        print(0)