Proposition: Prop. 10.027: Construction of Components of First Bimedial
(Proposition 27 from Book 10 of Euclid's “Elements”)
To find (two) medial (straight lines), containing a rational (area), (which are) commensurable in square only.
* Let the two rational (straight lines) $A$ and $B$, (which are) commensurable in square only, be laid down.
* And let $C$  in mean proportion3 (straight line) to $A$ and $B$  have been taken [Prop. 6.13].
* And let it be contrived that as $A$ (is) to $B$, so $C$ (is) to $D$ [Prop. 6.12].
Modern Formulation
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Table of Contents
Proofs: 1
Mentioned in:
Proofs: 1
Propositions: 2
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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