Question 1189568
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<pre>

Use the identity

    180*(n-2) = 3600    degrees,


where n is the number of sides of a/the polygon.


From this identity

    n-2 = {{{3600/180}}} = 20,


hence,  n = 20 + 2 = 22.    <U>ANSWER</U>


<U>ANSWER</U>.  22 sides.
</pre>

Solved.