
Basically, I want to form a rectangular surface joining the 4 nodes and a fillet surface joining the four nodes(comprising of previous 2 common nodes and the 2 other nodes). I tried extend surfaces but it did not work, and the requirement is to form the extended surface only, such that it resembles the above surface.
It's simple. Use "Geom" > Surface > Drag along vector: Select two edges as "lines".
Click on two nodes for N1 & N2
And the result is: