Adding plane in between edges/vertices I am new to blender so I have very basic question.
I have made a contour of my desired shape, but there was some extra vertices i did not need so I deleted them, but after deleting them the plane i had there disappeared too. So how do I place the plane back in between my selected edges? 
My second question is concerned about very similar problem of mine. How do I connect these selected edges to finish the shape of my shoe?
The solution of your problem is to Fill the empty space , in edit mode select all vertices and do F to fill your space , please try to ignore filling Obtuse angles shapes coz they can cause many topology problem