Interior angle+exterior angle = 180 degrees
abtues
Assuming I understand your question, the exterior angle of a regular pentagon is 72 degrees
If each exterior angle is 9 degrees then it is a regular 40 sided polygon.
The angle is 72 degrees.
Each exterior angle 36 degrees Each interior angle 144 degrees A decagon has 10 sides
15 degrees
360/9 = 40 degrees
36 degrees
360/100 = 3.6 degrees
That is not enough information.
6 degrees if it's a regular polygon