AutoCad :: How To Join 3 Lines / 2 Arcs

3 lines. 2 arcs. All coplanar, all meet end-to-end.

I set "Units/precision" to 0.00000000 and inspected them. They are all x=0 for each endpoint, therefore coplanar. I also did a point "ID" command and checked each endpoint approaching from both sides and confirmed that each pair of results was identical, so all the ends meet exactly.

I was under the impression that Join or at least PEDIT should be able to combine coplanar lines/arcs that all meet end to end into a polyline. Also, using the Express Tool's "FLATTEN" command doesn't work.

The reason I'm doing this is because I've drawn lines/arcs that trace along the midpoint of a sheet metal's material thickness, and this sheet metal has two bends in it and isn't flat anymore, so converting the lines/arcs to a single polyline will tell me how long the flat plate needs to be that will be ordered to create it.