Proposition: 4.11: Inscribing Regular Pentagon in Circle

Euclid's Formulation

To inscribe an equilateral and equiangular pentagon in a given circle.

fig11e

Modern Formulation

It is possible to inscribe a regular pentagon in a given circle.

Proofs: 1

Proofs: 1 2
Sections: 3


Thank you to the contributors under CC BY-SA 4.0!

Github:
bookofproofs
non-Github:
@Fitzpatrick


References

Adapted from (subject to copyright, with kind permission)

  1. Fitzpatrick, Richard: Euclid's "Elements of Geometry"

Adapted from CC BY-SA 3.0 Sources:

  1. Prime.mover and others: "Pr∞fWiki", https://proofwiki.org/wiki/Main_Page, 2016