import Control.Applicative ((<$>))
import Control.Monad (replicateM, replicateM_)
import Data.Complex (Complex(..), phase)
import Data.List (sort)
import Text.Printf (printf)

toDeg :: Double -> Double
toDeg = (/ pi) . (* 180)

computeAngle :: [Complex Double] -> Double
computeAngle = f . toDeg . (+ pi) . head . sort . map phase
    where f x = if x > 55.0 then 0.0 else x

main :: IO ()
main = do
    t <- readLn
    replicateM_ t $ do
        _ <- getLine
        ps <- map ((\(x : y : _) -> x :+ y) .
            map read . words) <$> replicateM 6 getLine
        printf "%.16f\n" (computeAngle ps)