Relativistic addition of velocities in a fife-dimensional spacetime

Another method of adding relativistic velocities is shown. It uses a fifth dimension of spacetime rotating the framework of the Minkowski diagram into it and thus is an indication of the existence of a fifth dimension. As proof of correctness of the result of the rotation the addition theorem of velocities is derived from it. Photographs of a hardware model illustrate how to find the resulting velocity by the rotation into the five-dimensional spacetime. Alongside the paradox “c + u´ = c” is resolved.