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what is the sum of the measures of the interior angle of a regular polygon if each exterior angle measures 120 degrees?

Mathematics
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That's just an example. But for regular polygons, the interior + exterior angles = 180.
So if the exterior angles are 120 then the interior must be 60.

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Other answers:

And like hero said, 360 divided by the exterior angle measurement gives you the number of sides or angles. So 360/120 = 3 so the sum of the interior angles must be 60x3.
180 degrees?
Yeah. Cause only triangles have 60 degree interior angles.
And triangles have 180 degrees inside them.
thanks guys

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