#!/usr/bin/env python

import math


def read():
    raw_input()
    xyList = []
    for i in range(6):
        xyList.append(map(float, raw_input().split()))
    return xyList


def work(xyList):
    minV = 1<<30
    for (x, y) in xyList:
        t = math.atan2(y, x)
        if t < -1e-6:
            continue
        minV = min(minV, t)
    print "%.10lf" % (minV * 180 / math.pi)


if __name__ == "__main__":
    for i in range(int(raw_input())):
        work(read())