If exterior angles are 120 then interior angles must be 60 so you have an equilateral triangle
Each interior angle of the regular 5 sided polygon measures 108 degrees
1440 degrees
1440 degrees
360
1800 degrees
Hint: in a regular polygon interior plus exterior = 180o, always.
Each interior angle of the regular 5 sided polygon measures 108 degrees
1260
360
1440 degrees
1440 degrees
360
1800 degrees
1440 degrees
540 degrees
Interior angle = 120 degrees Exterior angle = 60 degrees
180