Creates a new arc object and adds it to the drawing.
objectVariable = object.AddArc(Center, Radius, StartAngle, EndAngle)
objectVariable is an Arc object;
object is one of the ModelSpace or PaperSpace collection objects or a Block object;
Center is a Point object representing the center of the arc;
Radius is a double-precision variable or number representing the radius of the arc;
StartAngle and EndAngle are double-precision variables or numbers representing the starting and ending angles of the arc.