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 28
toCE, EF, each to each;and the angle AEB is equal (15.1.) to the angle CEF, becausethey are verlieal angles ; there-fore the base AB is equal (4. 1.)to the base CF, and the triangleAEB to the triangle CEF, andthe remaining angles to the re-maining angles, each to each, towhich the equal sides are… … 28 ELEMENTS
Euclid's Elements · Geometry · Trigonometry
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