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Q: What is the sum of the measures of the interior angles of a regular polygon if each exterior angle measures 90?

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Each interior angle of the regular 5 sided polygon measures 108 degrees

1440 degrees

1440 degrees

1800 degrees

If exterior angles are 120 then interior angles must be 60 so you have an equilateral triangle

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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

1800 degrees

If exterior angles are 120 then interior angles must be 60 so you have an equilateral triangle

1440 degrees

540 degrees

Interior angle = 120 degrees Exterior angle = 60 degrees

180

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