Some more confusion with CWSPA Practice exams

 

 

 

Howdy howdy, it's me again. Just a bit confused with this question here. I understand how to make the shape of the ornament, but the construction line in the images is confusing me. How would I sketch that out? To me, it doesn't seem like a simple convert or offset. Help would be appreciated! Might not respond for a few tho :P