Question

The sum of the interior angles of a polygon is 1620. The number of sides of the polygon must be

• A. 9
• B. 11
• C. 15
• D. 12

Answer 1

The Correct Option is B

Assume the number of sides of the polygon be  \(n\)

The Sum of interior angles of any polygon = \((n - 2) ×180 = 1620\)

= \(n - 2 = \frac{1620}{180}\)

= \(n - 2 = 9\)

= \(n = 11\)

So, The number of sides of the polygon is 11

The correct option is (B): 11