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 176
l angles, andlet the angle ASC=I)TF, the angle ASB=DTE, and theangle BSC—ETF\ then will the inclination of the planesASC, ASB, be equal to that of the planes DTE, DTE, For, ha\ing taken SB atpleasure, draw BO perpendicu-lar to the plane ASC] from thepoint 0, wdiere the perpendicu-lar meets the…
Geometry · Trigonometry
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