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 186
bases multiplied by the slant height. PEOPOSITION V. THEOEEM. If the three faces ichich include a triedrcd angle of a prism areequcd to the three faces ichich include a triedral angle of asecond p)risni, each to each, and are like placed, the twoprisms are equal. Let B and h be the vertices of two… … 181 then, since the triedral angles at h and B are equal, thoparallelogram Ih will coincide with i>//, and the parallelo-gram hf w-ith BF. But the two upper bases being equalto their corresponding lower bases, are equal to each other,and consequently, will coincide : hence, hi Avill coincidewith…
Geometry · Trigonometry
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