Each interior angle measures: 152o 18' 27.69''
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The measure of one exterior angle is 360/13 degrees so the measure of one interior angle is 180 - 360/13 = 152.3 degrees, approx.
32
It is 171 degrees
179.9 degrees
The sum of the interior angles is (28-2)*180 = 4680 degrees.
No - each different n-gon (pentagon, septagon, nonagon, etc) has a different angle measurement.