There are two classification
A. Straight lines
1.Horizontal lines - these are straight lines in lying position and they suggest calmness.
2. Vertical lines - these are straight lines in upward position and they suggest height and power.
3. Zigzag lines - these are straight lines, too. They suggest disorderliness and trouble.
4. Slanting lines - these are straight lines that give the feeling of action or motion.
B.Curved Lines - lines that suggest meanings like motion and feelings.
1. Wavy lines - these lines suggest gracefulness or continuity.
2. Spiral - these are curved lines that suggest action and motion.
3. Concave - a line curved inward.
4. Convex - a line curved outward.
Straight lines.
Epithelium lines the ear
If you mean what type of triangle has perpendicular lines then it is right angle triangle.
Lines of least travel time.
Parallel lines are two lines that will never intersect, like this.________________________________________________________
Straight lines.
EHV lines are type of electrical lines commonly used for experimentation in physics. They stand for 'Extra High Voltage' lines.
Eight straight lines, meeting in pairs at eight vertices.
I would say curved lines.
A _____ is a type of chord that consists of three pitches on consecutive lines or spaces.
Linear
The short dotted lines are the type of lines on a drawing that are designed to represent the hidden details.