import math
n = int(raw_input())
for loop in range(n):
    raw_input()
    XY = [map(float,raw_input().split()) for _ in range(6)]
    XY = [[x,y] for x,y in XY if y >= 0]
    XY = sorted(XY,reverse = True)
    x,y = XY[0]
    print math.acos((2.0-((1.0-x)**2+(0.0-y)**2))/2.0)*180/math.pi