If you have a table saw you can do arcs and circles on it.
Over kill jig:
An idiotic version:
Diresta doing it with a circular saw:
Find a middle ground to suit your needs. Plenty more on the web and YouTube. Up side is you can stack cut and depending on setup, easy to change. I have cut cardboard on table saws, and have had good results. But then again I do t know application so I don’t know how good of an edge finish you need.