02-12-2020
Mathematics

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PLEASE HELP NO SPAM! BRAINLIEST AND 5 STARS!

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jerrettl7627 jerrettl7627

02-12-2020

Answer:

has 3 sides

The formula for sum of interior angles is S = (n - 2) * 180. Therefore, 1980° = (n - 2) * 180. or, (n - 2) = 1980 / 180 = 11. or, n = 13

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