Please give an example of using the command "Arc" in Section
The ARC command in SE is convenient for making things such as a
bilge radius. First, you have to make a point which is at the intersection
of the bottom and side extended. Next, with the cursor on that point,
press "A" for ARC and enter the value for the radius.
The original point will then be replaced with a series of points
located on the curve of the arc.