If an angle is greater than 90 degrees but less than 180 degrees, what type of angle is it?

An angle that measures greater than 90 degrees but less than 180 degrees is classified as an obtuse angle. This is a fundamental definition in geometry where angles are categorized based on their measurements.

An acute angle is defined as being less than 90 degrees, making it unsuitable for this scenario. A right angle is precisely 90 degrees, which again does not fit the criteria given in the question. A straight angle is exactly 180 degrees, distinguishing it further from the range specified. Therefore, an angle falling between 90 and 180 degrees must be obtuse, as it exceeds the measurement of a right angle but has not yet reached that of a straight angle. This clear distinction supports why the classification of an obtuse angle is the correct response.