The first six books of the Elements of Euclid, in which coloured diagrams and symbols are used instead of letters .. (1847)
Euclid, Byrne, Oliver · London, W. Pickering · leaf 106
74 BOOK III. PROP. I. PROB. … O find the centre of a givencircle o Draw within the circle any ftraight draw —— _L -■■---- • biledt —wmmmmm■ , and the point of bifecfion is the centre. For, if it be pofhble, let any otherpoint as the point of concourfe of ——— , »■— ■ and —«■«■■» be the centre. Becaufe in
Geometry
Internet Archive · Thomas Fisher Rare Book Library · Public Domain Mark 1.0. Free to use for anything.
