Final answer:
A regular polygon with an angle of rotation equal to 18° has 20 sides.
Step-by-step explanation:
A regular polygon is a polygon that has all sides and angles equal. In order to find the number of sides of a regular polygon with an angle of rotation equal to 18°, we can use the formula:
Angle of rotation = 360° / number of sides
Substituting the given angle of rotation, we have: 18° = 360° / number of sides
Now we can solve for the number of sides:
Number of sides = 360° / 18° = 20
Therefore, a regular polygon with an angle of rotation equal to 18° has 20 sides.