If you mean a regular pentagon then each interior angle is 108 degrees and each exterior angle is 72 degrees
Exterior angle measures 18 degrees Interior angle measures 162 degrees
If exterior angles are 120 then interior angles must be 60 so you have an equilateral triangle
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Providing that it is a regular hexagon then the each interior angle measures 120 degrees and each exterior angle measures 60 degrees
Hint: in a regular polygon interior plus exterior = 180o, always.
Exterior angle measures 18 degrees Interior angle measures 162 degrees
If exterior angles are 120 then interior angles must be 60 so you have an equilateral triangle
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Each exterior angle measures 20 degrees Each interior angle measures 160 degrees
Providing that it is a regular hexagon then the each interior angle measures 120 degrees and each exterior angle measures 60 degrees
Each interior angle is 156 degreesEach exterior angle is 24 degrees
Interior angle = 120 degrees Exterior angle = 60 degrees
1260
540 degrees