The exterior angle is given by 360 / 10 = 36 degrees. The interior angle is given by 180 - the interior angle, ie 180 - 36 = 144 degrees.
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10
A regular 12 sided polygon each interior angle measures 150 degrees
There are 10
Sum of exterior angles = 360 degrees Sum of interior angles = 1440 degrees
The sum of the interior angles of a n-gon is (n-2)*180 So, (n-2)*180 = 1800 ie n-2 = 10 so that n = 12 It is a 12 sided polygon or dodecagon.