Davies, Charles, 1798-1876 · New York and Chicago, A. S. Barnes and company · leaf 163
162 GEOMETRY Of the Sphere. … PQ; the base of the cylinder isequal to the great circle, since itsdiameter A B is equal MN; hence,the convex surface of the cylin-der is equal to the circumferenceof the great circle multiplied byits diameter (Th. ii). This meas-ure is the same as that of the sur-face of the sphere (Th. xxiii)…
Geometry · Plane trigonometry
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