Calculating polylines total length

[ThomasMcCracken]

Hey Flex Gurus,

I'm trying to calculate the total length of my polylines after a query and adding graphics:  I found this code and I'm trying to get it to work but not having any luck:

private function executeCompleteHandler(event:QueryEvent):void
  {
 
   for each (var myGraphic:Graphic in event.featureSet.features)
   {
    myGraphic.addEventListener(MouseEvent.CLICK, unselectGraphic);
    myGraphic.addEventListener(MouseEvent.ROLL_OVER, toggleMapClick);
    myGraphic.addEventListener(MouseEvent.ROLL_OUT, toggleMapClick);
    myGraphicsLayer.add(myGraphic);
  
 
   
    var lengths:Array = GeometryUtil.geodesicLengths([ new Polyline(myGraphic.geometry.extent.toPolygon().rings)], Units.MILES);
    var i:int = 0;
    length+=lengths;
    i++;
   }

Any thoughts on how I could calculate the total length of the lines with the geodesicLengths method.  I'm not sure what the Polyline(mygGraphic...) method is even calculating here.  I found it on a post here in the forums but it's giving me way too big of a number.  Any advice would be much appreciated.

Thanks Flex Jedi Masters,

Thomas