Question

In the adjacent figure, a line $n$ falls on lines $l$ and $m$ such that the sum of the interior angle $1$ and $2$ is less than ${180}^{\circ }$, then what can you say about lines $l$ and $m$

Answer 1

According to Euclid's fifth postulate if a straight line falling on two straight lines makes the interior angle on same side less then ${180}^{\circ }$ , the two straight lines if produced indefinitely , meet on that side which are the angles less then ${180}^{\circ }$.

So , the lines $l$ and $m$ will meet on the right side of line $n$