In CAD
"A witness line is part of a dimension. It's the line that extends from the outside edges of the object being dimensioned, to where the dimension text is printed. It helps to point out what points on the object the dimension is measured from."
Definition of witness, relating to witness lines
"b. One who furnishes evidence."
Chat with our AI personalities
parallel lines are diagonal lines or increasing lines
intersecting lines divergent lines convergent lines
A rhombus has parallel lines but no perpendicular lines.
Right triangles have a set of perpendicular lines and no parallel lines.
They can be, and are, "skew". If they are not lines, they cannot be "skew lines".