What is the measure of one exterior angle of a 12-gon?

To find the measure of one exterior angle of a regular polygon, you can use the formula ( \frac{360^\circ}{n} ), where ( n ) is the number of sides. For a 12-gon, this would be ( \frac{360^\circ}{12} = 30^\circ ). Therefore, each exterior angle of a regular 12-gon measures 30 degrees.