Find tangent angle of a slot radius

[[Da...]]

I browsed a few posts but could not find a clear method to find the tangent angle for the characteristics shown in the screenshot. It's for a family of parts so I'd like to have a repeatable method.  What's the best way to find report this?

[[Ri...]]

I recently did what you need.

See attached image.

Create a point at the center of the part (Theoretical, intersection, projection, etc).

Scan the radius.

Drop in a "Tangents"

----Construction, Tangents

Select the Point and the Circle of your radius.

P.s.

I have an alignment that allows me to create the radius in the correct geometry location. (Trihedron showing =Z axis to center of Circle21).

It seems like we are doing the same type of slot, my dims are quite similar to yours.

 

Edited 30 minutes ago

[[Ri...]]

Deleted

 

Edited 30 minutes ago

[[Ma...]]

Can you make a theoretical circle from center and radius to center of groove's circle to intersection?