What is an angle that measures less than 90 degrees called?

An angle that measures less than 90 degrees is called an acute angle. Acute angles are characterized by their sharpness and are typically found in various geometric shapes and configurations. They play an important role in everyday contexts, such as in various types of design, architecture, and art.

In contrast, a right angle measures exactly 90 degrees, making it a distinct category of angles that serves as a standard reference in geometry. Obtuse angles measure more than 90 degrees but less than 180 degrees, representing another unique category of angles. Lastly, straight angles are those that measure exactly 180 degrees, which essentially forms a straight line. Understanding these different types of angles is key to grasping more complex geometric concepts and relationships.