Question 1155788
A polygon of n sides has half of the interior angles as 150 degrees each and the rest 170 degrees each. Find the value of n
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Ext angles are 30 and 10, equal # of each
n = 2*360/(30+10) = 18 sides
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9*150 + 9*170 = 2880 degs interior sum
2880 = 180*(18 - 2) as a check