Question

Find the number of sides in a regular polygon if its each interior angle is 160°.

• A. 17
• B. 14
• C. 18
• D. 15

Answer 1

Answer:

C. 18

interior angle$=\frac{(n-2)\times 180}{n}$

$160\times n=(n-2)180$

$8n=9n-18$

$n=18$