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 274
ft, are called the adjacent parts; and theother two, each of which is separated from the middle by an adja-<cent part, are called opposite parts. APPENDIX TO, &e. srs Thus in the right angled triangle ABC, A, being the right angle, ACAB,90°-B, 90°-BC, 90°-C, are the circular parts, by Def.… … if AB is taken for the middle part, AC and 90°—B are the adjacerttparts: 90° —BC, and 90° -C are the opposite. Or if 90°-BC be themiddle part, 90°- B, 90° -C are adjacent; AC and AB opposite, &c.This arrangement being made, the rule of the..circular part is con-tained in the following…
Euclid's Elements · Geometry · Trigonometry
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![An illustration from A treatise describing and explaining the construction and use of new celestial and terrestial globes; designed to illustrate ... the phoenomena [sic] of the earth and heavens, and to shew the correspondence of the two spheres. With a great variety of astronomical and geographical problems occasionally interspersed (1766)](https://img.insideoutlibrary.com/img/200/ia-treatisedescribi00adam-116-9.webp)
