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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