Proposition: Prop. 9.24: Even Number minus Even Number is Even
(Proposition 24 from Book 9 of Euclid's “Elements”)
If an even (number) is subtracted from an(other) even number then the remainder will be even.
* For let the even (number) $BC$ have been subtracted from the even number $AB$.
* I say that the remainder $CA$ is even.
(not yet contributed)
Table of Contents
Proofs: 1 2 3 4
Thank you to the contributors under CC BY-SA 4.0!
Adapted from (subject to copyright, with kind permission)
- Fitzpatrick, Richard: Euclid's "Elements of Geometry"
Adapted from CC BY-SA 3.0 Sources:
- Prime.mover and others: "Pr∞fWiki", https://proofwiki.org/wiki/Main_Page, 2016