It can be an acute, right angle or an obtuse angle depending on its size.
The interior angle of any polygon (other than a triangle) can have ANY value greater than 0 degrees and less than 360 degrees. 180 degrees may be excluded since that does not really make an angle. There is no other requirement of an individual angle. Consequently, you cannot find an interior angle of a 9-gon.
Each interior angle measures 135 degrees Each exterior angle measures 45 degrees
Convex(all interior angles are less than, or equal to, 180 degrees) and concave(one interior angle is more than 180 degrees).
A polygon cannot have an interior angle of 8100 degrees, as the maximum interior angle for any polygon is less than 180 degrees. The sum of the interior angles of a polygon increases with the number of sides, but no individual angle can exceed 180 degrees in a convex polygon. If an angle were to be 8100 degrees, it would suggest a complex structure or a non-standard definition of a polygon. In standard geometry, such an angle would be impossible.
An angle greater than 0 but less than 90 degrees is an acute angle
An angle that is less than 90 degrees is an acute angle.
A angle less than 90 degrees is a acute angle.
The angles between adjacent sides of a polygon that are interior to the polygon. If the polygon is convex, the interior angles are always less than 180 degrees. If it is concave, at least one interior angle will be greater than 180 degrees.
A regular polygon cannot have an interior angle of less than 60 degrees. If it is not regular, then you haven't a hope of answering this question.
An obtuse angle is greater than 90 but less than 180 degrees as for example each interior angle of a regular 5 sided pentagon measures 108 degrees.
A regular polygon cannot have an interior angle that is less than 60 degrees.
An angle less than 90 degrees is called an acute angle.