The fifth postulate is about parallel lines.

When two or more lines never intersect each other in a plane and perpendicular distance between them is always constant then they are said to be parallel lines.

The two facts of the postulates are:

(i) If P doesn’t lie on l then we can draw a line through P which will be parallel to the line l.

(ii) There will be only one line can be drawn through P which is parallel to the line l.