How many degrees are in a right angle?

A right angle is defined as the angle that measures exactly 90 degrees. This measurement is a fundamental concept in geometry, as it is one of the basic building blocks for defining other angles and shapes.

When considering the other options, the angles of 45 degrees, 180 degrees, and 360 degrees represent different types of angles. An angle measuring 45 degrees is considered an acute angle, which is less than 90 degrees. An angle of 180 degrees is a straight angle, representing a straight line. Finally, 360 degrees represents a full rotation or a complete circle. Understanding that a right angle specifically measures 90 degrees helps clarify the distinctions between these types of angles and solidifies the foundational knowledge of angles in geometric terms.