Creating an Edge on Existing Surface

I have this surface that I split with an arc shape. I then deleted said shape, so all i have is this surface with no edges.

I would like the edge of the top of the arc so that I can use it elsewhere, and when I try to redraw the arc I can’t get it to be exactly the same size/shape.

Is there a way to creat an edge out of the surface that will be exact?

so ?

This is German, but u will find it.


If you just need the edge curve from the surface, you can use DupEdge or DupBorder commands.
The edge curves are part of the surface NURBS definition.


thank you!!

thank you!!!

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