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 31
a^BE,EC ; much more then are BA, ACgreater than BD, DC. Again, because the exterior angle of a triangle (1<S. 1.) is greateriban the interior and opposite ang^le, the exterior angle BDC of thetriangle CDE is greater than CED ; for the same reason, the exteriorangle CEB of the triangle ABE is… … PROP. XXII. PROB. To construct a triangle of which the sides shall be equalto three given straight lines; but any two whatever ofthese lines must be greater than the third (20. 1.) Let A, B, C be the three given straight lines, of which any twowhatever are greater than the third, viz. A and B…
Euclid's Elements · Geometry · Trigonometry
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