Documenting a Polygon with Rounded Corners

Maybe measure with one of these?

How about documenting it?

It almost seems like I need virtual points "out in space" which indicate where the corners would have been if the corners were not rounded. That makes logical sense but I don't think I have ever seen it on a drawing.

This is probably going to be easy and make my question look foolish. But somehow it seems like all I remember are items made from circles, squares, rectangles or shapes so odd that solid models are provided and features are not dimensioned. If the angles came down to a sharp intersection then this would be easy. Coming down to a rounded shape makes my intersection point in free-space. I just don't remember doing that on a "proper mechanical drawing".

There might be a way to document and check the shape before the corners are rounded. Then use one or more radius gauges to check the rounding of the corners.

Thanks for the video link. It is directly on target. After watching the video link I Googled the video's term "fillet sharp". It seems to only give me info on sharp knives for cutting fish. Having to use a virtual point is easy to understand. I just didn't know how to defend it with an ASME or other reference. I also didn't know if you leave the point blank or draw in a point (not likely) or cross hairs.

Thank you.

Thank you.

Any references (ASME, etc.) that I can quote. I especially would like to justify against a standard having a blank virtual point (or cross hairs if per standard).

Google CAD dimensions "fillet sharp"

Had a demo of this measuring system a couple of weeks ago as a possible upgrade to our existing vision measuring system. It would measure & document that part within 5 seconds.