Question

Find the number of sides of a polygon, the sum of whose interior angle is 1620°​

Answer 1

Answer:

The number of edges (sides) is 'n'

The sum of all the interior angles of any regular polygon = ( n - 2 ) x 180

Therefore , ( n - 2 ) x 180 = 1620

( n - 2 ) = 1620 / 180

( n -2) = 9

n = 9 + 2

n = 11