Can there be an easy way to add arc points so that radii can be estimated easily?

Please disregard this. I found that it's already working. Thx.

We could maybe also allow hovering over an arc point and see the radius for that arc point. We do have to calculate the radius as part of the process of calculating the area & length anyway.

Sounds good and could be useful to know.

Refer new documentation for ARC Tool