If you are using the pline command and tracing a shape and come to a tangent arc, pick arc then s for second point and select the midpoint of the arc, then the end of the arc and continue on, it does not draw the arc with the correct radius. I use this method for writing descriptions, however all my radius lengths are now wrong. If you use arc then pick radius pt and end of arc it draws it correctly.
To test this: draw 2 lines, fillet them with a radius (say 50'), then trace over it with a pline using line, arc, second pt(mid pt of arc), then to end of second line. Seems to draw it wrong every time.
Vince Popish