All the angles of a 20 sides polygon are the same. How much is each?

Explanation

ns: Number of sides, `n=2`
The sum of the angles of the polygon
``
beginarray/l
=(n-2) xx 180^(circ)
=(20-2) xx 180^(circ)
=18 xx 180^(circ)=3240^(circ)
endarray
...