Before you start working with parallel lines, you have to know what parallel lines are. Parallel lines are coplanar lines that do not intercet. Look the the picture of the road sign above and the outer edges of the sign. There are two sets of parallel lines. The two horizontal lines are parallel and the two vertical lines are parallel. The lines in each set could go on and on forever and would never touch one another; this is what makes them parallel.
Check out the internet site, Math: for Morons Like Us, for more information about parallel lines. Here you can find definitions of parallel lines as well as discover what parallel lines look like.
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