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In Figure, examine whether the following pairs of lines are parallel not:

$\mathrm{EF}$ and $\mathrm{GH}$

In this Figure, find out which pair of lines are parallel:

In this figure, examine whether the following pairs of lines are parallel or not:

$\mathrm{AB}$ and $\mathrm{CD}$

In this Figure, state which pair of lines are parallel. Give reason.

In this figure, show that

$\mathrm{EF}\parallel \mathrm{GH}$

In the given figure, show that

$\mathrm{AB}\Vert \mathrm{CD}$

$\overleftrightarrow{AB}$ and $\overleftrightarrow{CD}$ are two lines. A transversal $T$ intersect them. Find if the lines $\overleftrightarrow{AB}$ and $\overleftrightarrow{CD}$ are parallel, under the following conditions $\angle P=100°$ and $\angle R=100°$.

$\overleftrightarrow{AB }$and $\overleftrightarrow{CD}$ are two lines. A transversal $T$ intersect them. Find if the lines $\overleftrightarrow{AB}$ and $\overleftrightarrow{CD}$ are parallel, under the conditions $\angle Q=80°$ and $\angle R=100°$.