What do we call an angle that measures more than 90 degrees but less than 180 degrees?

An angle that measures more than 90 degrees but less than 180 degrees is referred to as an obtuse angle. Obtuse angles are important in geometry as they represent angles that are wider than right angles but not a straight line.

For instance, if you imagine a right angle, which is exactly 90 degrees, an obtuse angle will open further, creating a larger space between the two rays that form the angle, yet it will still not reach the point where it forms a straight angle (180 degrees). This distinction makes obtuse angles a unique category of angle measurements.

In contrast, acute angles measure less than 90 degrees, while right angles are exactly 90 degrees. Reflex angles, on the other hand, exceed 180 degrees but are less than 360 degrees. Understanding these classifications helps in identifying and working with angles in various geometric contexts.