Parallel lines

Definition of parallel lines: Two lines are said to be parallel if they never meet each other.Two parallel lines are always apart by the same distance.

There is a link provided below where you will learn in detail about parallel lines:parallel perpendicular lines

The diagram of of parallel lines are shown below:

Properties of parallel lines:
1)When another line is drawn through two or more parallel lines, The resulting angles are same.
2)The sum of the two adjacent angles is 180 degree

I am giving a link on Pair of straight lines as well.

Next time we will learn the above properties with the help of diagram by giving detail explanation.