There was an [old post about problems with Eagle arcs, but apparently no activity since. I also wanted to use arcs in a design, but the DRCBot flags them as a trace-width violation, even though there appears to be solid copper that’s at least 20 or 30 mils wide in every direction.
I think I can work around this with polygons, but wanted to see whether there’s an easier way?](Arcs in EAGLE - SparkFun Electronics Forum)