True Position using Polar angle

[[Er...]]

Hello forum,

This is the first time encountering this issue. My feature tab is displaying an angle which I cannot find out where its coming from.
Alignment: I'm aligning my part using the top plane to level, center at the center bore, and rotating to one of the holes and rotating back (31°) to make it orthogonal.
Issue: Angle should be170° but its showing 162°

Not sure what is causing this! Any help? My true position is measuring .084 due to the 162°

angle rotation2.JPGangle rotation.JPG

[[Ma...]]

You have it there - 180° - 10° ( from A2 ) is 170°

For that angle you would need to use "Angle between features" in Menu with TP, profiles and so on.

[[Er...]]

Angle A2 is displaying correctly. However the true position is using 162° to calculate which I do not understand.
I have inspected the part manual on the surface plate and angle plates, the worst result is .010. Just trying to understand where the number is coming from.

angle rotation3.JPG

[[so...]]

The yellow highlighted place is where you plug in the nominals. So you enter the nominal 170.

Sonali kakade

[[Ma...]]

So that seems, that cylinder axis is not pointing into alignment origin. So there is that wrong angle. Because A2 is correct - aiming for 170°.