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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 46
©F GEOMETRY. B60t I. <ftS PROP. XLIV. PROB. To a given straight line to apply a parallelogram, whichshall be equal to a given triangle, and have one of its an-gles equal to a given rectilineal angle. Let AB be the given straight line, and C the given trianglej andD the given rectilineal angle.… … the triangle C, having the angle EBG equal to the angle D» andthe side BE in the same straight line with x\B: produce FG to H,and through A draw (3l. 1.) AH parallel to BG or E^, and joinHB. Then because the straight line HF falls upon the parslllelsAH, EF, the angles AHF, HFE, are together equal… Euclid's Elements · Geometry · Trigonometry
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