Sorry but yet another thing that’s bugging me and that I can’t figure out.

The developers kit lists this method for polylines:

CenterPoint Compute the center point of the polyline as the weighted average of all segments.

Here is a polyline set at the origin (the center is a point placed at the center Osnap):

Here is the excel calculation for the 8 line segments:

So why does Rhino show (2, 2.25) for the centre and excel has (2.11, 2.39)?

SteveOh