why do artist use parallel lines that do intersect??

Thank you for using the Jiskha Homework Help Forum. Here is a definition of parallel:
extending in the same direction, everywhere equidistant, and not meeting

Just what art are you referring to?

Parallel lines do not intersect. That's why they are parallel.

What LOOKS like intersecting parallel lines is really the artist portraying a scene with perspective -- the receding lines to the horizon.

See this: http://studiochalkboard.evansville.edu/lp-intro.html
From: http://studiochalkboard.evansville.edu/draw.html

Artists use parallel lines that appear to intersect to create the illusion of depth and perspective in their artwork. This technique is called "foreshortening" and is commonly used in drawings, paintings, and other forms of visual art.

When objects or lines recede into the distance, they appear to converge and eventually meet at a point called the "vanishing point." By using parallel lines that converge towards a vanishing point, artists can create the illusion of depth and make their artwork appear more realistic.

To achieve this effect, artists often use techniques such as linear perspective. This involves drawing guidelines or construction lines that converge towards the vanishing point, which helps establish the overall composition and spatial relationships within the artwork.

If you would like to see examples and learn more about how artists use parallel lines and perspective in their work, you can visit the following link: http://studiochalkboard.evansville.edu/lp-intro.html

This resource provides a comprehensive introduction to drawing and explains various techniques artists use to create depth and perspective in their artwork.