Final answer:
The shag haircut is cut at a 90-degree elevation and overdirected to maintain perimeter length and weight. Overdirecting involves pulling the hair towards a central point to preserve length.
Step-by-step explanation:
A particular hairstyle that is cut at a 90-degree elevation and then overdirected to maintain length and weight at the perimeter is known as a shag. This haircut is characterized by its layered texture, which can increase volume and create a sense of movement within the hair. By cutting the hair at a 90-degree angle from the head, the stylist adds uniform layers throughout. The technique of overdirecting the hair involves pulling the hair away from its natural fall position, towards a central point before cutting. This helps to preserve the length and fullness at the edges of the hair.