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Book IV

Byrne's edition - page by page

123 124-125 126-127 128-129 130-131 132-133 134-135 136-137 138-139 140-141 142-143 144

Proposition by proposition

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 IV

Definitions from Book IV
Byrne's edition - Definitions 1, 2, 3, 4
Byrne's edition - Definitions 5, 6, 7
David Joyce's Euclid
Heath's comments

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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