Final answer:
The reference point is the most used benchmark on any bender and can be either end of the line or the middle of the line. It helps measure distances, angles, and other geometric properties.
Step-by-step explanation:
The reference point is the most used benchmark on any bender. It can be either end of the line or the middle of the line, also known as "the origin." The reference point helps in measuring distances, angles, and other geometric properties.