Schmall, Charles Nelson. [from old catalog] · New York, D. Van Nostrand company · leaf 20
ent a full definition of the subject.The satisfactory definition of any science is often one of the latestand most difficult achievements of that science. — Ladds Psychology. CO-ORDINATES. THE POINT 3 £c-axis, is the abscissa or x of the point P. The line PM,measured parallel to the ?/-axis, is the… … (-a^+l/}?- {-x,~y)F -fi+^+y) 4- P(+x,.-y) Fig. 2b. YFig. 2c. point is designated by its co-ordinates, abscissa first, ordinatenext; e. g., the point (x, y), the point {li, k), point {a, h), etc. 3. Convention of Signs. — If distances measured in onedirection on a straight line are defined as…
Geometry, Analytic
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