Question

If $\text{l}$ $\parallel$ $\text{m}$ and $\text{m}$ $\parallel$ $\text{n}$, what can be said about l and n?

Answer 1

From Proclus' postulate, we know
"Straight lines parallel to the same straight line are parallel to one another."
$\because$ Both l and n are parallel to the same straight line i.e., m
$\therefore$ l $\parallel$ n.