With links to the complete edition of Euclid with pictures in Java by David Joyce, and the well known comments from Heath's edition at the Perseus collection of Greek classics.

Introductory
David Joyce's Introduction to Book I
Heath on postulates
Heath on axioms and common notions

Definitions from Book I
Byrne's definitions are in his preface
David Joyce's Euclid
Heath's comments on the definitions

Proposition I.1
Byrne's edition
David Joyce's Euclid
Heath's comments

Proposition I.2
Byrne's edition
David Joyce's Euclid
Heath's comments

Proposition I.3
Byrne's edition
David Joyce's Euclid
Heath's comments

Proposition I.4
Byrne's edition
David Joyce's Euclid
Heath's comments

Proposition I.5
Byrne's edition
David Joyce's Euclid
Heath's comments

Proposition I.6
Byrne's edition
David Joyce's Euclid
Heath's comments

Proposition I.7
Byrne's edition
David Joyce's Euclid
Heath's comments

Proposition I.8
Byrne's edition
David Joyce's Euclid
Heath's comments

Proposition I.9
Byrne's edition
David Joyce's Euclid
Heath's comments

Proposition I.10
Byrne's edition
David Joyce's Euclid
Heath's comments

Proposition I.11
Byrne's edition
David Joyce's Euclid
Heath's comments

Proposition I.12
Byrne's edition
David Joyce's Euclid
Heath's comments

Proposition I.13
Byrne's edition
David Joyce's Euclid
Heath's comments

Proposition I.14
Byrne's edition
David Joyce's Euclid
Heath's comments

Proposition I.15
Byrne's edition
David Joyce's Euclid
Heath's comments

Proposition I.16
Byrne's edition
David Joyce's Euclid
Heath's comments

Proposition I.17
Byrne's edition
David Joyce's Euclid
Heath's comments

Proposition I.18
Byrne's edition
David Joyce's Euclid
Heath's comments

Proposition I.19
Byrne's edition
David Joyce's Euclid
Heath's comments

Proposition I.20
Byrne's edition
David Joyce's Euclid
Heath's comments

Proposition I.21
Byrne's edition
David Joyce's Euclid
Heath's comments

Proposition I.22
Byrne's edition
David Joyce's Euclid
Heath's comments

Proposition I.23
Byrne's edition
David Joyce's Euclid
Heath's comments

Proposition I.24
Byrne's edition
David Joyce's Euclid
Heath's comments

Proposition I.25
Byrne's edition
David Joyce's Euclid
Heath's comments

Proposition I.26
Byrne's edition
David Joyce's Euclid
Heath's comments

Proposition I.27
Byrne's edition
David Joyce's Euclid
Heath's comments

Proposition I.28
Byrne's edition
David Joyce's Euclid
Heath's comments

Proposition I.29
Byrne's edition
David Joyce's Euclid
Heath's comments

Proposition I.30
Byrne's edition
David Joyce's Euclid
Heath's comments

Proposition I.31
Byrne's edition
David Joyce's Euclid
Heath's comments

Proposition I.32
Byrne's edition
David Joyce's Euclid
Heath's comments

Proposition I.33
Byrne's edition
David Joyce's Euclid
Heath's comments

Proposition I.34
Byrne's edition
David Joyce's Euclid
Heath's comments

Proposition I.35
Byrne's edition
David Joyce's Euclid
Heath's comments

Proposition I.36
Byrne's edition
David Joyce's Euclid
Heath's comments

Proposition I.37
Byrne's edition
David Joyce's Euclid
Heath's comments

Proposition I.38
Byrne's edition
David Joyce's Euclid
Heath's comments

Proposition I.39
Byrne's edition
David Joyce's Euclid
Heath's comments

Proposition I.40
Byrne's edition
David Joyce's Euclid
Heath's comments

Proposition I.41
Byrne's edition
David Joyce's Euclid
Heath's comments

Proposition I.42
Byrne's edition
David Joyce's Euclid
Heath's comments

Proposition I.43
Byrne's edition
David Joyce's Euclid
Heath's comments

Proposition I.44
Byrne's edition
David Joyce's Euclid
Heath's comments

Proposition I.45
Byrne's edition
David Joyce's Euclid
Heath's comments

Proposition I.46
Byrne's edition
David Joyce's Euclid
Heath's comments

Proposition I.47
Byrne's edition
David Joyce's Euclid
Heath's comments

Proposition I.48
Byrne's edition
David Joyce's Euclid
Heath's comments