Newcomb, Simon, 1835-1909 · New York, H. Holt and company · leaf 31
d all be equaliw absolute value. To avoid ambiguity in this respect the algehraic signof the abscissa is supposed positive when meas-ured from 0 towards theright, and negative when meas-ured towards the left. The ordinate MP issupposed positive when meas-ured upiDard, and negative when meas-ured… … y = + ^;y = - hy = — b. Thus the ambiguity is completely avoided when the algebraicsigns of the co-ordinates, as well as their absolute values, aregiven, so that only one point corresponds to one pair of alge-braic values of the co-ordinates. 16. Rectangular Co-ordinates. When not otherwise…
Geometry, Analytic
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