Davies, Charles, 1798-1876 · New York and Chicago, A. S. Barnes and company · leaf 132
22. If a polygon be inscribedin the base of a cone, and straightlines be drawn from its verticesto the vertex of the cone, the pyra-mid thus formed is said to be in-scribed in the cone. Thus, thepyramid S—ABCD is inscribed inthe cone … 132 GEOMETRY Of the Sphere, 23. Two cylinders are similar, when the diameters of theirbases are proportional to their altitudes. 24. Two cones are also similar, when the diameters of theiibases are proportional to their altitudes. 25. A sphere is a solid terminated by a curved surface, alithe…
Geometry · Plane trigonometry
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![An illustration from Divina proportione : opera a tutti glingegni perspicaci e curiosi necessaria oue ciascun studioso di philosophia: prospettiua pictura sculptura: architectura: musica: e altre mathematice: suavissima: sotile: e admirabile doctrina consequira: e delecterassi: co[n] varie questione de secretissima scientia (1509)](https://img.insideoutlibrary.com/img/200/ia-divinaproportion00paci-94-181.webp)
