Legendre, A. M. (Adrien Marie), 1752-1833, Brewster, David, Sir, 1781-1868, Davies, Charles, 1798-1876 · New York, Wiley & Long · leaf 146
146 GEOMETRY. … Cor, 1. Let S-ABCDE,S-XYZ be two pyramids, hav-ing a common vertex and thesame altitude,, or having theirbases situated in the sameplane ; if these pyramids arecut by a plane parallel to theplane of their bases, giving thesections ahcde^ xyz. then willthe sections abode, xyz, he to eachother as the…
Trigonometry · Geometry
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