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 27
is impossible; therefore BE is not in thesame straight line with BC. And in like manner, it may be de-monstrated, that no other can be in the same straight line with it but BD, which therefore is in the same straight line with CB. Wherefore, if at apoint, i3*c. Q. E. D. PROP. XV. THEOR. If two… … OF GEOMETRY. BOOK I. 37
Euclid's Elements · Geometry · Trigonometry
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