How many degrees are in a right angle?

A right angle is defined as the angle formed when two lines meet at an angle of exactly 90 degrees. This concept is fundamental in geometry, where angles are classified based on their degree measurements. A right angle specifically indicates that the angle measures one-quarter of a full rotation, which is 360 degrees.

When considering the other choices, 180 degrees represents a straight angle, which is formed when two lines point in opposite directions. An angle measuring 270 degrees corresponds to three-quarters of a full rotation, thus making it larger than a right angle. Lastly, 360 degrees signifies a complete rotation, returning to the original position without forming an angle.

This understanding is crucial, as right angles are widely used in various disciplines, including architecture, engineering, and everyday activities, reinforcing the importance of accurately identifying their measurement as 90 degrees.