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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