func main()
	var N: int :: cui@input().toInt(&)
	for n(1, N)
		do cui@input()
		var ans: float :: 50.0
		for(1, 6)
			var _: [][]char :: cui@input().split(" ")
			var x: float :: _[0].toFloat(&)
			var y: float :: _[1].toFloat(&)
			var rot: float :: lib@invRot(0.0, 0.0, x, y)
			if(rot.abs() < ans.abs())
				do ans :: rot
			end if
		end for
		do cui@print("\{lib@toDegree(ans).toStrFmt(".15f")}\n")
	end for
end func