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
ralMopipedon 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 equal to thealtitude of A G: there… … BOOK YII. 187 D LP A \i^ -In equivalent to AG, and consequently, the parallelopipedourequired. But if ABCD is not a rectangle, draw M QAO and BN perpendicular to JJC, andOQ and NP perpendicular to the base; i I we shall then have, a rectangular piral-lelopipedon JLi>i\6>-(): for, by…
Geometry · Trigonometry
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