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 44
OP GEOMETRY. BOOK I. 43 … PROP. XL. THEOR. Equal triangles on the same side of bases, which areequal and in the same straight line, are between the sameparallels. Let the equal triangles ABC, DEF be upon equal basis BC, EF^in (he same straight line BF,and towards the same parts jthey are between the same pa-rallels. Join…
Euclid's Elements · Geometry · Trigonometry
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