Extract Geometry

 From:  karter

Im tying to recreate a sweep or tapered extrusion from the planar surface shown. I have a line drawn at 45 deg from the topedge. Being there is no extrude tapered I wanted to sweep the line around the edge but seemingly sweep wants a closed curve or the line orientating correctly ?. Question is how would one extract the curves from that planar surface to join together ?

Image Attachments:
Size: 51.3 KB, Downloaded: 39 times, Dimensions: 580x349px