Is there an explanation/guide of how different options of rounds work in Creo?

I want to know what curves are used in generating the rounds. If not exact curve details are provided, I would at least like to know at a high level what sort of curves are created when various options of rounds are used.

I did some research/ trail-n-error to know what curves the first two options generate.

Circular: Most basic, inserts a circle of the given radius with the same distance from edges

Conic: Inserts a parabola if the conic distance is 0.5

                          ellipse if <0.5

                         hyperbola if >0.5

I am sure about inserting parabola at 0.5 because I was able to reproduce the parabola equation. I am not entirely sure about ellipse and hyperbola.

Highly appreciate your help on this.