I'm having a little bit of trouble understanding the 5th Postulate and was wondering if someone could be kind enough to explain it to me in the simplest way possible because I have read at least two other websites and all they have done is confuse me more, I AM NOT ASKING FOR HOMEWORK ANSWERS,

I have a Geometry Project and I was assigned Euclid's 5 Postulates and to explain how they are right and I get 1-4 but 5 I'm still foggy on

thanks