Euclid's elements of geometry, Volum 1

ABC is equal angle ABC angle ACB angle AGH angle BAC angle BCD angle EDF angles CBA angles equal applied Axiom base BC Book called centre circle coincide common CONCLUSION CONCLUSION.-Therefore Construction CONSTRUCTION.-1 contained Definition Demonstration DEMONSTRATION.-1 derived diameter distance divide draw drawn Enunciation equal sides equal to AC equilateral triangle exterior angle extremity figure formed Geometry given point given rectilineal angle given straight line greater Hypothesis impossible Join length less meaning meet opposite angle opposite sides parallel parallel straight lines parallel to CD parallelogram position Postulate produced pronounced Proof Prop PROPOSITION proved reasoning rectilineal figure remaining angle right angles SEQUENCE SEQUENCE.-The shew shewn side BC sides sides equal square superficies surface Take term thing third angle tion triangle ABC Wherefore whole