140 degrees is an obtuse angle
An angle of 140 degrees would be called obtuse.
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If the interior angle = 140 degrees, then the exterior angle = 180 degrees - 140 degrees = 40 degrees. So the number of sides is 360 degrees / 40 degrees = 9 sides (a nonagon).
40 degrees ( 180 - 140 = 40 )
Each angle for a regular nonagon is 140 degrees each.
Each exterior angle: 40 degrees Each interior angle: 140 degrees
140 degrees.