The term "180 degrees" refers to a specific angle measurement in geometry. It represents a straight line, where two rays extend in opposite directions from a common point, creating a flat angle. In a circle, 180 degrees is half of the total 360 degrees, indicating that it divides the circle into two equal halves. In practical applications, 180 degrees is often used in navigation and orientation. For example, turning 180 degrees means turning around to face the opposite direction. This concept is also relevant in various fields, such as architecture, engineering, and sports, where precise angles are crucial for design and performance.