TITLE: theorems equivalent to the parallel postulate
QUESTION [6 upvotes]: Is there a good survey article listing all the theorems of Euclidean geometry that are equivalent to the parallel postulate?

REPLY [3 votes]: Doug Chatham's answer is the best I received; see Theorem 23.7 of George E. Martin's "The Foundations of Geometry and the Non-Euclidean Plane".