genyjoannerubiera
12.02.2020 •
Mathematics
X = 7 - 3y
217 - 3y) + 4y = 8
14 - 6y + 4y = 8
14 – 2y = 8
-2y = -6
y = 3
x = 7 - 3(3)
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Ответ:
Step-by-step explanation:
no of sides (n)=11
sum=(n-2)180
=(11-2)180
=9*180
=1620
therefore sum of the interior angles of a polygon having 11 sides id 1620°.