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 266
232 BOOK VI. PROP. XIV. THEOR. … II. And parallelograms which have one angle in each equal, and the Jides about them reciprocally proportional, are equal. J and and Let — ■ — , be (o placed that . and — — may be continued right lines. It is evi- and dent that they may affume this pofition. (B. i. prs. 13, 14, '5-) % Complete V…
Geometry
Internet Archive · Fisher - University of Toronto · Public domain (published before 1931). Free to use for anything.
