Elements of geometry : containing the first six books of Euclid, with a supplement on the quadrature of the circle, and the geometry of solids : to which are added, Elements of plane and spherical geometry (1826)
Playfair, John, 1748-1819, Euclid · Philadelphia : Marot & Walter · leaf 36
lic common angle BGH: therefore the remaining angle AGH is equalto the remaining an.gie GHD; and they are alternate angles; there-fore AB is parallel to CD. Wherefore, if a straight line, &c. Q. E. D. PROP. XXIX. THEOR. If a straight line fall upon two parallel straight lines, itmakes the…
Euclid's Elements · Geometry · Trigonometry
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