Answer:
30 degrees
Explanation:
A regular polygon is a polygon in which all the side lengths are equal.
All regular polygons have rotational symmetry, that means it can be rotated so that the pre-image and the image are the same.
The angle by which this rotational symmetry occurs is the exterior angle of the polygon.
Given a regular polygon with 12 sides, the exterior angle is:
[tex]\frac{360}{12}=30\degree[/tex]Therefore, the angle of rotation that will carry onto itself is 30 degrees.