Euclid's parallel postulate: its nature, validity, and place in geometrical systems .. (1905)
Withers, John William, 1868- · Chicago, Open Court Publishing Co.; [etc., etc.] · leaf 38
gels vol., Leip-zig. 1899. * Proposition 16. Paper of 1840. See Halsteds Translation. DISCOVERY OF NON-EUCLIDEAN SYSTEMS 25 is the only line which does not meet CD, we mayassume it to be possible that there are other lines,for example AG, which do not cut DC. how farsoever they may be prolonged. In… … the line DC, while upon the other side everystraight line, AF,.etc.. cuts the line DC. Now theangle HAD between the parallel HA and the per-pendicular AD is called the parallel angle. H thisbe a right angle the prolongation AE of the perpen-dicular will be parallel to the prolongation DB ofCD. In…
Geometry, Non-Euclidean · Parallels (Geometry)
Internet Archive · California Digital Library · Public Domain Mark 1.0. Free to use for anything.
