Degree of rotation of a polygon = 360 degrees/ Number of sides.
We have 360 degrees because the total degree of rotation across a point is 360 degrees. Hence based on the number of sides of the polygon, we can calculate the degree of rotation of polygon
Given, Number of sides =12
Degree of rotation = 360/12 = 30
Degree of rotation for a polygon with 12 sides = 30 degrees