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 248
BOOK VI PROP. II. THEOR. 2I4 A * * F a Jlraight line be drawn parallel to any jide .—.—..— of a tri- angle, it Jliall cut the other fides, or thofe Jides produced, into pro- portional fegments . And if any Jlraight line divide the fides of a triangle, or thofe fides produced, into proportional feg-… … V- (B. 6. pr. i), 0 *■*»»■■ ■ ■**«•!•■ HiHtllllB' . (B. 5.pr. ii).
Geometry
Internet Archive · Fisher - University of Toronto · Public domain (published before 1931). Free to use for anything.
