If all interior angles are 162, polygon has 20 sides.
Step-by-step explanation:
Questioner has mentioned that a polygon has interior angles of 162 It is assumed from this that all interior angles are 162.
As interior angles are 162, each exterior angle is 180−162=18.
Sum of all the exterior angles of a polygon is always 360 and as each exterior angle is 18,
Number of angles / sides of polygon are 360 / 18 = 20