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
Correct Answer: Option B
Explanation
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