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 158
H, the angles LHG,KHG areright angles (16. 3.); therefore,there are two angles of the tri-angle HGK, equal to two an-gles of the triangle HGL, eachto each. But the side GH is^common to these triangles;therefore they are equal (26.1.), anil GL is equal to GK.Again, in the triangles KGL,KGN, because… … 158 SUPPLEMENT TO THE ELEMENTS to the angle GNK, and the angles GMK, GMN are both right angle*by consfructiof.; wherelore, (he triangles GMK. GMN have two an-gles oCthe one equal Jo two angles oT the other, and they have alsothe side GM common, therefore they are equal (26. 1.), and ttie sideKM is…
Euclid's Elements · Geometry · Trigonometry
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