Good luck. Handle graphics only implements drawing from point-to-point by straight lines betweens; any arc is resolution of the points which create it as line segments. There is no arc "object", nor afaik, any way to build such an animal except by drawing it.
ADDENDUM
You can, of course, encapsulate into a function the facility to draw such an arc given those inputs and have that function take care of the nitty-gritty but that, to the best of what I can think of now, is the closest thing to an "object" you can get (outside the OOP paradigm nomenclature/implementation of course).
