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 318
is equal to BA, and EC toFC: And in the triangles EBA, FBA, EB, BA are equal to FB, BA,and the base E A is equal to the base FA; wherefore the angle EBA isequal to the angle FB A,and the triangle E B Aequal to the triangleFB A,and the other angles equal to the other angles; therefore these… … them l>y three triangles, the common vertex of which is the point G^and their bases the straight lines AB,BC, CA, and by three other tri-angles the common vertex of which is the point E, and their bases thesame lines AB, BC, C A. The other solid is contained by the samethree triangles, the…
Euclid's Elements · Geometry · Trigonometry
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