How to loft the edge?

There is no direct way to do it i see. Just redraw the shape of the top again and Loft the surfaces.

  1. Step 1:

    Select Top Plane Which is the top of the shape too. Open a scetch.

  2. Step 2:

    Draw a sketch just like the shape of the top. Be sure there are 20 edges not 10.

  3. Step 3:

    You can draw 2 of them and circle pattern them 10 times.

  4. Step 4:

    Select Lofted Surface and fill in other options.

  5. Step 5:

    Everything looks just fine.