Proposition: Prop. 9.31: Odd Number Coprime to Number is also Coprime to its Double
Euclid's Formulation
If an odd number is prime to some number then it will also be prime to its double.
Modern Formulation
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Table of Contents
Proofs: 1
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References
Adapted from (subject to copyright, with kind permission)
 Fitzpatrick, Richard: Euclid's "Elements of Geometry"
Adapted from CC BYSA 3.0 Sources:
 Prime.mover and others: "Pr∞fWiki", https://proofwiki.org/wiki/Main_Page, 2016