Suggestion:
So if the polygon has 4 angles that total 360, then to find one of the angles you subtract the 3 angle values from 360.
I hope this helps.
<span>The men, He that is washed, nor are their families, the memory of their native land nor hold.
To their ship, they came to the land of which, do not return</span>
In defining tribal sovereign powers, Justice Marshall described tribes as “domestic dependent nations,” meaning that although tribes were “distinct independent political communities,” they remained subject to the paternalistic powers of the United States.
i found this not sure if it helps. :)