I'd like to add a 180 degree arc to the top of a rectangle and remove the internal lines to create a single shape (best described as a 'finger' shape).
I've managed to create both shapes, but lining them up is proving tricky and then selecting Path/Union seems to only remove portions of the common lines.
I'd welcome some advice on the bet way to go about doing this to help expedite my workflow and contain the swearing.