three or more coplanar lines

http://www.bbb.org/blog/2012/01/save-purple-fever-for-the-stands-and-a-cool-head-for-scoring-playoff-tickets/

 

This is the Baltimore Ravens football field and obviously it is used by the Ravens to play football. The lines that mark the yards on the field are all parallel and do not intersect and also are coplanar. These yard lines are found on any football field. The lines are also used in different sports such as lacrosse and not just by professionals.