The purpose of using hidden lines in a drawing is to convey what type of information?

The use of hidden lines in a drawing is essential for conveying internal details that are not visible from the exterior view of the object being represented. These lines signify features such as holes, recesses, or contours that exist inside or behind the visible surfaces of an object. By employing dashed or dotted lines to represent these hidden features, the designer can communicate critical information about the complete geometry of the item without cluttering the drawing with unnecessary views. This technique enables a clearer understanding of how parts interact and function with each other, allowing for accurate manufacturing or construction based on a full assessment of the design.