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 21
n theangle FAG common to the two Irian- ^ jrles, AFC, AGB; therefore the baseFC is equal (4. 1.) to the base GB,and the trianale AFC to the triangleAGB; and ll)e rotnaiiiing unifies ofthe one are equal (4.1.) to the re-maining angles of the other, each toeach, to which the equal sides areopposite,… … OF GEOMETRY. BOOK I. SI remainder CG; and FC was proved to be eqiial toGB, theiefore thetwo sides BF, FC are equal to the two CG, GB, each to each; but theangle BFC is equal to the angle CGB; whet-efore the triangles BFC,CGB are equal (3. 1^), and their remaining angles are equal, toivhith the…
Euclid's Elements · Geometry · Trigonometry
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