let () =
    let n = Scanf.scanf "%d\n" (fun x -> x) in
    for i = 1 to n do
        let x1, y1, x2, y2, x3, y3 = Scanf.scanf "%f %f %f %f %f %f\n" (fun x1 y1 x2 y2 x3 y3 -> x1, y1, x2, y2, x3, y3) in
        let a = ((x2-.x1)**2.0 +. (y2-.y1)**2.0)**0.5 in
        let b = ((x3-.x2)**2.0 +. (y3-.y2)**2.0)**0.5 in
        let c = ((x1-.x3)**2.0 +. (y1-.y3)**2.0)**0.5 in

        let a1 = 2.0*.(x2 -. x1) in
        let b1 = 2.0*.(y2 -. y1) in
        let c1 = x1**2.0 -. x2**2.0 +. y1**2.0 -. y2**2.0 in
        let a2 = 2.0*.(x3 -. x1) in
        let b2 = 2.0*.(y3 -. y1) in
        let c2 = x1**2.0 -. x3**2.0 +. y1**2.0 -. y3**2.0 in

        let x = (b1*.c2 -. b2*.c1) /. (a1*.b2 -. a2*.b1) in
        let y = (c1*.a2 -. c2*.a1) /. (a1*.b2 -. a2*.b1) in
        let r = (a*.b*.c) /. (((a+.b+.c)*.(b+.c-.a)*.(c+.a-.b)*.(a+.b-.c))**0.5) in

        Printf.printf "%.3f %.3f %.3f\n" x y r
    done