Euclid I.2 (Euclid, Elements, Book I, Proposition 2)

Text: http://www.perseus.tufts.edu/hopper/text?doc=Perseus%3Atext%3A1999.01.0086%3Abook%3D1%3Atype%3DProp%3Anumber%3D2

To place at a given point (as an extremity) a straight line equal to a given straight line.

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

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