Bailey, Frederick H. (Frederick Harold), 1865- · Boston, London, Ginn & Co. · leaf 17
(2) i.e., if three j^oints lie iij/on the same straight line, the linejoining any one of them to a second is equal to the line join-ing the third to the second decreased by the line joining thethird to the first. 2. Cartesian Coordinates. Since the first element of geometrical discussion is… … Fig. 2. THE POINT. d Let XX and YY be two straight lines intersecting at 0.Distances from YY, measured parallel to XX, shall be de-noted by X, X being positive, if measured in the directionOX, and negative, if measured in the direction OX. Dis-tances from XX, measured parallel to YY, shall be…
Geometry, Analytic
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