The following is as given in Sir Thomas L. Heath's translation, which can be found in the book The Thirteen Books of The Elements, Vol. 1.

Book I | Book II | Book IX |
---|---|---|

Definitions, Postulates, and Common Notions | Definitions | Proposition 20 |

Proposition 1, Proposition 3, | Proposition 14 | Proposition 36 |

Proposition 5, Proposition 6, | ||

Proposition 29, Proposition 47 |

- Any rectangular parallelogram is said to be
**contained**the the two straight lines containing the right angle. - And in any parallelogrammic area let any one whatever of the parallelograms about its diameter with the two complements be called a
**gnomon**.