There are many types of lines used in math and some of them are:-
Perpendicular line that intersect each other at right angles or 90 degrees
Parallel lines that never intersect each other
Lines of intersect that form equal opposite angles
Transversal line that cuts through parallel lines with special angular properties
Solidus line that separates the numerator from the denominator in fractions
Line of best fit that is used in data analysis
Straight line equations that are plotted on the Cartesian plane
Segment lines that have defined end points
Number line that has numbers from negative to positive in ascending order
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.
I would say curved lines.
Eight straight lines, meeting in pairs at eight vertices.
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.