What is Euclid's fifth postulate

Euclid fifth postulate gives information regarding parallelism of lines. Euclid's fifth postulate states If a straight which falls on two straight lines makes interior angle on the same side of it. And if sum those two interior angles is less than 180°, then two straight will not be parallel which means they if they produced indefinitely they will surely meet on the side where some of interior angles is less than 180°.

This postulate is more complex as compared to other four postulates. It says that two parallel lines never meet. This postulate is also known as parallel postulate.