Hi
Sample code for creating arc: will need start point, end point, through point
var startPoint = new paper.Point(Arc.StartPoint.X, (Arc.StartPoint.Y ));
var midPoint = new paper.Point(Arc.MidPoint.X, (Arc.MidPoint.Y));
var endPoint = new paper.Point(Arc.EndPoint.X, (Arc.EndPoint.Y));
var pathArc = new paper.Path.Arc(startPoint, midPoint, endPoint);
Hope this helps
Philip