Angles in 3D
I have tried using vectors in 3D. There was a need to measure the angle between the vectors. Giving the Angle[<Vector>, <Vector>] command resulted in an error: 'Sorry, something went wrong. Please check your input' or 'Przepraszam, wejście jest niedopuszczalen' (PL, 'Sorry, the input is unacceptable').
It seems that measuring 3D angles is not yet implemented. I am looking forward to it, waiting anxiously.