True Length of Oblique Lines

Oblique lines are lines that are not parallel to any of the principal planes of projection. They appear foreshortened in every view, and their true length can be found by creating an auxiliary view with a line of sight perpendicular to the view of the oblique line. The fold line between these two views will be parallel to the oblique line.

Questions

1. What is an oblique line?
2. How do you find the true length of an oblique line?
3. How do you locate an oblique line in space?

Answers

1. An oblique line is a line that is not parallel to any of the principal planes of projection.
2. To find the true length of an oblique line, you need to create an auxiliary view with a line of sight perpendicular to the view of the oblique line. The fold line between these two views will be parallel to the oblique line.
3. To locate an oblique line in space, you need to take dimensions from fold lines and projection lines extended from an existing view.