Which of these angles is classified as obtuse?

An obtuse angle is defined as an angle that measures more than 90 degrees but less than 180 degrees. This means that an angle classified as obtuse will always be situated in the range of angles that open wider than a right angle but not quite to a straight angle.

Choosing the option that states "Between 90 and 180 degrees" accurately captures the full scope of obtuse angles. In contrast, angles measuring less than 90 degrees are classified as acute angles, right angles are exactly 90 degrees, and angles greater than 180 degrees are referred to as reflex angles. By identifying the correct range for obtuse angles, you can better understand the classifications of angles in geometry.