What is meant by the distance between two parallel lines.

Lines in the same plane that do not meet are called parallel lines. The figure shown below is made of $5$ lines $m, n, o, p$ and $q$. Which two lines are parallel?

Two parallel lines $AB$ and $CD$ are intersected by a transversal $EF$ at $M$ and $N$ respectively. The lines $MP$ and $NP$ are the bisectors of interior angle $\angle BMN$ and $\angle DNM$ on the same side of the transversal. Then, $\angle MPN$ is equal to

If $\mathrm{l}$ is a transversal of $\mathrm{P} \mathrm{and} \mathrm{Q}$, a pair of corresponding angles is equal, then the lines $\mathrm{P} \mathrm{and} \mathrm{Q}$ are _____.

In the diagram $AB\parallel GH\parallel DE$ and $GF\parallel BD\parallel HI,$$\angle \mathrm{FGC}={80}^{\mathrm{o}}$. Find the value of $\angle CHI.$

In figure, using angle sum property of a triangle, find out value of x in terms of $ \alpha $ , $ \beta $ , $ \gamma $ ?

In the adjoining figure $AB\parallel CD$ and $PQ,$ $QR$ intersect $AB$ and $CD$ at $E, F, G$ and $H$ respectively. Given that $\angle PEB={80}^{\mathrm{o}}$, $\angle QHD={120}^{\mathrm{o}}$ and $\angle PQR=x^{\mathrm{o}}$, find the value of $x.$

_____ lines in a plane never meet.

Choose the pair of parallel lines in the following.

Would these lines meet, if extended?