Geometry/Neutral Geometry/Euclid's First Four Postulates

Euclid's Postulate I For every point P and for every point Q not equal to P there exists a unique line that passes through P and Q Explanation Informally, this postulate says that two points determine a unique line. Euclid's Postulate II For every segment AB and for every segment CD there exists a unique point E on line AB (needs LaTex formatting) such that B is between A and E and segment CD is congruent to segment BE Explanation [To Come] Euclid's Postulate III For every point O and every point A not equal to O, there exists a circle with center O and radius OA Explanation [To Come] Euclid's Postulate IV All right angles are congruent to one another Explanation [To Come]