Question

In the figures given below, write which lines form a pair of parallel lines and write them in the form of symbols:

Answer 1

If the distance between two lines is same everywhere then the lines are parallel to each other.

(1) In this figure, line $AB$ is parallel to the line $CD$ which is symbolically written as $\overleftrightarrow{AB}||\overleftrightarrow{CD}$

(2) In this figure, line $m$ and $n$ are not parallel to each other.

(3) In this figure, line $XY$ is not parallel to the line $CD$

(4) In this figure, line $EP$ is parallel to the line $FQ$ which is symbolically written as $\overleftrightarrow{EP}||\overleftrightarrow{FQ}$