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
Verified Correct Answer: B.
Step-by-Step Mathematical Solution
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
Source: Myschool Past Questions Archive (Record #36794)