Question 1181122
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You write the equation as you read the problem


    900 = 180*(n-2)    degrees  (the sum of interior angles of an n-gon)


You cancel the factor 180 in both sides


    5 = n-2.


From it, you find the <U>ANSWER</U> to your problem  n = 5 + 2 = 7.
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That is all.



No need to write multi-line solution for such simple problem.