Animated generation of parabola

Please enable Java for an interactive construction (with Cinderella).

The spherical view (stereographic projection) is included for visualizing the motion also at infinity (intersections of the red directrix with the blue circumference of the view). The spherical view nicely shows that a parabola closes at infinity!

Please enable Java for an interactive construction (with Cinderella).

[ conics | GA with Cinderella ]

Soli Deo Gloria. Created with Cinderella by Eckhard Hitzer (Fukui).