The measure of one exterior angle of a regular 18-gon is 20°. The sum of all exterior angles of a regular polygon is always 360° so the measure of each exterior angle can be calculated by dividing 360° by the number of sides. In this case that would be:
Therefore the measure of one exterior angle of a regular 18-gon is 20°.
Each exterior angle measures 72 degrees
Each exterior angle of a regular octagon measures 45 degrees
Each exterior angle of a regular 6 sided hexagon measures 60 degrees
Each exterior angle measures 15 degrees
Each exterior angle measures 40 degrees
Each exterior angle measures 72 degrees
Each exterior angle measures 72 degrees
Each exterior angle of a regular octagon measures 45 degrees
Each exterior angle of a regular 6 sided hexagon measures 60 degrees
Providing that it is a regular duodecagon each exterior angle measures 30 degrees
Each exterior angle measures 36 degrees
Each exterior angle measures 15 degrees
Each exterior angle measures 40 degrees
Exterior angle measures 18 degrees Interior angle measures 162 degrees
180
45 degrees
If you mean a regular pentagon then each interior angle is 108 degrees and each exterior angle is 72 degrees