And the reason it's like that is because it's dead boring to have a load of concentric circles, whereas that's much more exciting, to look at something at that angle, isn't it? Right? And by doing it at that angle, if you've got that misconception in your head, then that two-dimensional representation of a three-dimensional thing will be ellipses.
São assim pois é um tédio ver vários círculos concêntricos. É mais interessante ver algo na diagonal, nesse ângulo, não é? Mas, olhando na diagonal, se temos a ideia errada na cabeça, então a representação bidimensional de algo tridimensional será elíptica.