How many degrees are in a right angle?

A right angle is defined as the angle that is formed when two lines intersect to create a perfectly square corner. It is a standard measurement in geometry and is universally accepted as having a measurement of 90 degrees. This concept is foundational in both geometry and various applications, such as construction, where right angles ensure that structures are built accurately. The other choices represent angles that do not fit the definition of a right angle; they are either acute angles, which are less than 90 degrees, or obtuse angles, which are greater than 90 degrees.