Proposition: 4.09: Circumscribing Circle about Square
(Proposition 9 from Book 4 of Euclid's “Elements”)
To circumscribe a circle about a given square.
* Let $ABCD$ be the given square.
* So it is required to circumscribe a circle about square $ABCD$.
It is possible to circumscribe a circle about a given square.
Table of Contents
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