Davies, Charles, 1798-1876 · New York and Chicago, A. S. Barnes and company · leaf 133
r, 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 points of which are equally distant from a certain… … 27. The radius of a sphere is aline drawn from the centre to anypoint of the circumference. Thus,CA is a radius.
Geometry · Plane trigonometry
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