Elements of geometry and trigonometry. Revised and adapted to the course of mathematical instruction in the United States (1856)
Legendre, A. M. (Adrien Marie), 1752-1833, Davies, Charles, 1798-1876 · New York : A.S. Barnes · leaf 191
eJon be con-ceived, having for itsiQwer base the paral-lelogram ABCD, and forits ujiper base NOPQ^this thiid parallelopipedon will be equivalent to the paral-lelopipedon AG^ since they have the same lower base, andtheir u])per bases lie in the same plane and between theBame paraltels, QG, NF (p.… … riiorosiTiox x. theorem. Any pnralMopipedon may he dtanrjed into an equivalent reel-anynlar jiarallelopijxdon having/ an eijual altlttale and anequicalent hase. Let ABCD-II be any parallelopipedon. From the vertices A,B, C ]), draw A I, BK,CL^ DM^ perpendicular tothe plane of the lowerbase, and…
Geometry · Trigonometry
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