What radius track degrees will run parallel to obtain an inner and outer loop?
You should post this in N scale,
I'm not up on what radius are offered in N scale EZ track, I see they make a 19" radius and a 17.5" radius, these would be good for an inside and outside loop.
The degree's are how many degree the track points to if you start from zero degree's
if you had a single one piece circle it would be a 360° if you had two pieces thatformed a circle they would be 180° 4 would be 90° if it takes 12 to make a full circle they are 30°
Hope this helps
NM-Jeff