thunderbolt

The small triangular part of the wall is exterior. Inside, under the shed roof, there is no wall. I've explored many of the educational videos. If I created an "Invisible" wall, wouldn't that make the triangular part invisible too? I don't know how to delete my redundant question? I can't see how to delete it "... under options at the bottom of your post" There is an "Edit" option but not a delete.

How can I create an exterior wall under a shed roof? see photo

How do I create an exterior wall under a shed roof? See photo