What is the degree measurement of a right angle?

A right angle is defined as an angle that measures exactly 90 degrees. This measurement is fundamental in geometry and carpentry, as it ensures that lines and structures are perpendicular to one another, which is crucial for achieving accurate and stable constructions.

The other angle measurements listed serve different purposes: 60 degrees is characteristic of an equilateral triangle, where each angle is equal, while 180 degrees represents a straight angle, indicating a straight line. Meanwhile, 45 degrees is significant in certain design contexts, such as making diagonal cuts, but it is not the defining measure for a right angle. Thus, the choice of 90 degrees is essential for establishing proper angles in construction practices.