A Treatise on Spherics: Comprising the Elements of Spherical Geometry, and of Plane and Spherical Trigonometry, Together with a Series of Trigonometrical Tables
J. Mawmar, 1816 - 294 pagina's
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angle opposite base bisect circle EFH circumference co-tangent common section cosine describe a circle describe Art diameter drawn equal and parallel equal arches equal circles equal spheres equal to FE equations Euclid's Elements Find Art fore given angle given arch given circle given great circle given point given side given sphere given triangle greater hypotenuse Introd join Art less lesser circle meet oblique-angled opposite angle parallel circles perpendicular plane triangle polar distance polar triangle pole Problem PROP proposition quadrantal triangle radius right angles right-angled spherical triangle scale of chords ScholIUM semi-circumference shewn side BC sine sphe sphere's center sphere's surface spherical angle spherical distance Spherical Geometry spherical tri Spherical Trigonometry straight line tangent Theorem three angles three sides touch the circle triangle ABC trigonometrical functions wherefore
Pagina 70 - If two triangles have two angles of the one equal to two angles of the other, each to each, and one side equal to one side, viz. either the sides adjacent to the equal...
Pagina 3 - A circle is a plane figure contained by one line, which is called the circumference, and is such, that all straight lines drawn from a certain point within the figure to the circumference are equal to one another.
Pagina 55 - Theorem. If two spherical triangles on the same sphere, or on equal spheres, are equilateral with respect to each other, they are also equiangular with respect to each other.
Pagina 72 - If two triangles have one angle of the one equal to one angle of the other and the sides about these equal angles proportional, the triangles are similar.
Pagina 70 - BC common to the two triangles, which is adjacent to their equal angles ; therefore their other sides shall be equal, each to each, and the third angle of the one to the third angle of the other, (26.
Pagina 3 - A diameter of a circle is a straight line drawn through the center and terminated both ways by the circumference, as AC in Fig.
Pagina 158 - If two triangles have two sides and the included angle in the one equal to two sides and the included angle in the other, each to each, the two triangles will be equal.
Pagina 50 - THEOREM. The sum of the sides of a spherical polygon is less than the circumference of a great circle.