package main

import (
	"bufio"
	"fmt"
	"math"
	"os"
	"sort"
	"strconv"
)

func out(x ...interface{}) {
	fmt.Println(x...)
}

var sc = bufio.NewScanner(os.Stdin)

func getInt() int {
	sc.Scan()
	i, e := strconv.Atoi(sc.Text())
	if e != nil {
		panic(e)
	}
	return i
}

func getInts(N int) []int {
	ret := make([]int, N)
	for i := 0; i < N; i++ {
		ret[i] = getInt()
	}
	return ret
}

func getString() string {
	sc.Scan()
	return sc.Text()
}

// min, max, asub, absなど基本関数
func max(a, b int) int {
	if a > b {
		return a
	}
	return b
}

func min(a, b int) int {
	if a < b {
		return a
	}
	return b
}

func asub(a, b int) int {
	if a > b {
		return a - b
	}
	return b - a
}

func abs(a int) int {
	if a >= 0 {
		return a
	}
	return -a
}

func lowerBound(a []int, x int) int {
	idx := sort.Search(len(a), func(i int) bool {
		return a[i] >= x
	})
	return idx
}

func upperBound(a []int, x int) int {
	idx := sort.Search(len(a), func(i int) bool {
		return a[i] > x
	})
	return idx
}

func getFloat() float64 {
	sc.Scan()
	ret, _ := strconv.ParseFloat(sc.Text(), 64)
	return ret
}

func main() {
	sc.Split(bufio.ScanWords)

	T := getInt()

	for i := 0; i < T; i++ {
		// ans := 1e10
		for j := 0; j < 6; j++ {
			x, y := getFloat(), getFloat()
			deg := 180 * math.Atan2(y, x) / math.Pi
			if deg >= -1e-9 && deg <= 50+1e-9 {
				out(deg)
			}
			// th := math.Atan2(y, x)
			// if th < -1e-9 {
			// 	continue
			// }
			// ans = math.Min(ans, th)
		}
		// out(ans * 180 / math.Pi)
	}
}