In the figure, do the segments $AB$ and $CD$ intersect? Are they parallel? Give reasons for your answer.

 

 

Using a set square and a ruler, test whether $l\parallel m$.

Using a set square and a ruler, test whether $l\parallel m.$

Two lines are parallel if they do not meet, even when produced.

Two parallel lines are everywhere the same distance apart.

If two line segments do not intersect, they are parallel.

If two rays do not intersect, they are parallel