Analytic geometry and principles of algebra (1913)
Ziwet, Alexander, 1853-1928, Hopkins, Louis Allen, joint author, Hedrick, E. R. (Earle Raymond), 1876-1943 · New York, The Macmillan Company · leaf 301
are parallel and proportional tothe sides of a quadrilateral, the forces are in equilibrium, i.e. their resultantis zero. Similarly for any closed polygon. 303. Translation of Coordinate Trihedral. Let x, y, z bethe coordinates of any point P with respect to the trihedralformed by the axes Ox, Oy,… … hedral OiXiyiZ^, then the relations between the old coordinatesX, y, z, and the new coordinates Xy, y^, z^ of one and the samepoint P are evidently ^ x = a + Xy, y = h + yx, z=zc + Zy. The coordinate trihedral has thusbeen given a translation, representedby the vector 00^. This operationis also…
Geometry, Analytic
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