Euclid I.12 (Euclid, Elements, Book I, Proposition 12)

Text: https://www.perseus.tufts.edu/hopper/text?doc=urn:cts:greekLit:tlg1799.tlg001.perseus-eng1:1.prop.12

To a given infinite straight line, from a given point which is not on it, to draw a perpendicular straight line.

Made with GeoGebra: https://www.geogebra.org/

Affiliate Links:
Swan Bitcoin: http://swan.com/davidshane