An angle of 181 degrees is a reflex angle.
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No, it is not possible to have a triangle with an angle of 181 degrees. The sum of the interior angles of a triangle is always 180 degrees according to Euclidean geometry. Any triangle with an angle greater than 180 degrees would not be a valid geometric shape.
An angle that is more than 180 degrees but less than 360 degrees. In other words, a reflex angle is 181 degrees to 359 degrees.
21 An angle of 110 degrees is an obtuse angle.
48 degrees is an acute angle.
A straight angle measures 180 degrees.