and profile views and as a point view in the horizontal
views.
♦ Level line: any line that is parallel to the horizontal
plane is a level line. Level lines are horizontal lines.
♦ Inclined lines: Inclined lines will be parallel to the
frontal or profile planes and at angle to the horizontal
plane and appears true length in the views where it is
parallel to a principal plane.C. Classification based on Type
♦ Oblique: oblique lines are inclined to all three
principal planes and therefore will not appear true
length in a principal view.
♦ Foreshortened: lines that are not true length in a
specific view appear shortened than their true length
measurement.
♦ Point view: a point view is a view of a line in which
the line is perpendicular to the viewing plane (the line
of sight is parallel to the line).
♦ True length: a view in which a line can be measured
true distance between its end points shows the line as
true length and appears true length in any view where
it is parallel to the plane of projection