Legendre, A. M. (Adrien Marie), 1752-1833, Brewster, David, Sir, 1781-1868, Davies, Charles, 1798-1876 · New York, Wiley & Long · leaf 166
he cone ;the hypothenuse SB describes the convexsurface of the cone. The point S is named the vertex of thecone, SA the axis or the altitude, and SBthe side or the apothem. Every section IlKFI, at right angles tothe axis, is a circle ; every section SDE,through the axis, is an isosceles… … BOOK VIII. 1G7 We may conceive it to be generated by the revolution of atrapezoid ABHG, whose angles A and G are right angles, aboutthe side AG. The immoveable line AG is called the axis oraltitude, of the frustum, the circles BDC, HFK, are its bases, and13H is its side. i. Two cylinders, or two…
Trigonometry · Geometry
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