Extract curve from joined surfaces

Rhino Rhino for Mac
1

Hello all,

Can anyone assist in extracting a curve from the edge of these two joined surfaces?
rhinohelp.3dm (3.2 MB)

Thanks!

2

DupEdge command

1 Like
3

There are no joined surfaces in you file. It has three individual surfaces, two of which appear to be the result of splitting one surface with the other surface.

4

This is exactly what I was looking for. Thank you!