And yet our beloved river Portus,the river than love too much the unfforgetable Anabitarte,and perhaphs the spring again in the hearht of brother Othon.Although everytime than we return to
Euclid ,we,ve must know his owns definitions.Book III.Definition II. And then:
" A right line is said to tough a circle when it meets
the circle,and being produced does not cut it "
A postulate that will be useful when we talk about the south pole.
