Stop exotic behavior of angles ja angular dimensions. Angle should have direction (CW or CCW (when looking at sketch plane)) and angular dimension should show real value (even when it's 180deg, bigger than 180deg or bigger than 360deg).
-Negative values should be handled too.
Sometimes you get VERY INTRESTING situations since angles are not defined - see attached model and try to change dimension d31 on Sketch4 from value 5 to value 6 example . If you change the value throug parameter table it works right, but when you change the dimension it flips the dimension direction.

