What is the measurement of an acute angle?

The measurement of an acute angle is defined as being less than 90 degrees. Acute angles are a fundamental concept in geometry, distinguishing them from other types of angles. While a right angle measures exactly 90 degrees, and an obtuse angle exceeds 90 degrees but is less than 180 degrees, an acute angle remains within that preliminary range, specifically between 0 and 90 degrees. Understanding this distinction is essential in various geometrical applications, such as triangle classification and the study of polygons, where acute angles play a significant role in shape properties.