Select curve from polyline

Hell ereryone, can I just elect 3 curve from the polyline and make a loft to be a Y surface?Stereographic_projection_ME_V2 (41.1 KB)

like this

as with everything there are many other ways - here’s one building off of where you left off:
Stereographic_projection_ME_V2 (56.7 KB)

Right. But in this way, at the boundery has a gap. May we have a better way to make it?

oops…yeah (l.o.l) - thanks for pointing out my laziness

I was gone - if it still helps:
Stereographic_projection_ME_V2 (50.1 KB)