noun

geometryan angle that measures more than 90 degrees but less than 180 degrees."the angle is obtuse."
An obtuse angle is an angle that measures more than 90 degrees but less than 180 degrees. In other words, it is larger than a right angle and smaller than a straight angle.
An angle is a measure of rotation or turning and is usually measured in degrees or radians. In geometry, an angle is the figure formed by two rays, sharing a common endpoint called the vertex.
An acute angle is an angle that measures less than 90 degrees.
A reflex angle is an angle whose measure is greater than 180 degrees but less than 360 degrees.
Degrees are a unit of measurement for angles, representing the rotation between two rays. The degree angle system divides a full rotation into 360 units called degrees.