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The sum of the interior angles of regular polygon is 1800

The sum of the interior angles of regular polygon is 1800o. How many sides has the polygon?

A.

16

B.

12

C.

10

D.

8

View answer & explanation

Correct answer is B

Sum = (n - 2)180

1800 = (n - 2)180

divide both sides by 180o

\(\frac{1800}{180}\) = (n - 2)\(\frac{180}{180}\)

10 = n - 2

10 + 2 = n

n = 12

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