Final answer:
The most commonly used elevations in haircutting are 0 degrees for blunt cuts, 45 degrees for shaped or layered cuts, and 90 to 180 degrees for more dramatic layering and volume.
Step-by-step explanation:
The most commonly used elevations in haircutting refer to the angle at which the hair is held away from the head when cutting. These elevations create different shapes and layers in the haircut. Common elevations range from 0 degrees (no elevation), commonly used for blunt or bob cuts, to 90 degrees, where the hair is lifted to a right angle from the head for layering. The higher the elevation, like at 180 degrees, the more dramatic the layering will be. It's also important to consider the natural fall of the hair, as gravity plays a role in determining the final look of the haircut.
For example, if a hairstylist is aiming to create a shaped or layered effect, they might use a 45-degree elevation to produce a gentle slope. Higher elevations such as 90 or 180 degrees can increase the perceived volume and movement within the hair, because layers become shorter and can stand away from the head. Each elevation serves a different purpose and can dramatically change the outcome of a haircut.