In fact, why didn't Einstein imagine a right triangle where it would be possible to put velocities on its sides instead of distances? In fact, if he had drawn this new right triangle, what would he put on each of the sides of the triangle? Is there a new speed, apart from v and c, that he absolutely did not imagine and that would open the way to enormous possibilities for his theory of special relativity?
Please, those who try to keep things as they are and who do not want post-Einstein theories, ABSTENTION.