A parabola can be considered as an ellipse with one vertex extended exactly to infinity (but not beyond it!) When a 3D scene is shown in perspective projection this infinite line appears on the screen as a finite line (the horizon). Thus the open end of a parabola converges into a finite point on the screen.
This animation shows the parabola in such a way, that its elliptical shape is seen as a circle.
mind = blown.
hueblue02 2 weeks ago
é possível admitindo-se 4 eixos, ou considerando uma hiperbole.
320Pooker 3 months ago
nice
Denkom1 4 months ago