Explore ellipses · parabolas · hyperbolas through eccentricity and directrix
by Claude · cantlinmath.com
Eccentricity ec0.60Ellipse
0.05ellipse1.00hyperbola2.80
Directrix orientation
Directrix value d3.0
123456
Rectangular ( x-y )
conic
focus
directrix
—
Polar ( r-θ )
conic
pole / focus
directrix
—
Focus is at the origin / pole.
The directrix is the line x = d, located
away from the focus on the side opposite the nearest vertex. |
ec < 1 → ellipse ec = 1 → parabola ec > 1 → hyperbola