Any angle between 90 and 180 degrees is an obtuse angle.
Therefore: 160 degrees is an obtuse angle.
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An angle that is 160 degrees would be an "obtuse" angle. This is because the measurement of degrees exceeds 90. Anything below 90 degrees would be an "acute" angle.
20 degrees
It is a reflex angle because it is greater than 180 degrees
Each exterior angle measures 20 degrees Each interior angle measures 160 degrees
Its exterior angle is 20 degrees and it will have 360/20 = 18 sides