import sequtils,strutils,complex,math

var
    T = stdin.readline.parseInt
    x,y : float64
    p : Complex64
    n : string
    
for t in 1..T:
    var d : float = 1
    n = stdin.readline
    for i in 0..5:
        (x,y) = stdin.readline.split.map(parsefloat)
        p = complex64(x,y)
        var Ph = phase(p)
        if Ph > -0.0000000001:
            d = min(d, Ph)
    echo formatFloat(d / PI * 180, ffDecimal, 14)