question_answer

In a regular polygon, every interior angle is 8 times of its exterior angle. The number of sides of the regular polygon is                                                                                                                   [WBSSC (CGL) 2014]

A) 18        

B) 12

C) 15                                

D) 08

Correct Answer: A

Solution :

We know, exterior angle of a polygon

and interior angle of a polygon

where, n is the sides of a polygon.

Now, according to the question,

Interior angle = 8  Exterior angle