Proposition: 3.17: Construction of Tangent from Point to Circle
(Proposition 17 from Book 3 of Euclid's “Elements”)
To draw a straight line touching a given circle from a given point.
Modern Formulation
It is possible to construct a tangent to a given circle.
Table of Contents
Proofs: 1
Mentioned in:
Proofs: 1
Sections: 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