Connecting two different planes

What do you do when you want to connect a semicircle to a square?

You copy the semicircle into a new layer and convert it into a square/rectangle, then Bridge the two together :)

If you manually create a square and add points so it matches the number in your semicircle, it still might not work. I think the point order of both objects need to be the same to get the best any case, it's always fun to try a different way of doing things.