Analytic geometry for colleges, universities, and technical schools (1892)
Nichols, E. W. (Edward West), 1858- · Boston [Mass.] : Leach, Shewell & Sanborn · leaf 235
ne of definite length on another lineis that portion of the second line included between the feet ofthe perpendiculars drawn from the extremities of the line ofdefinite length to that line. 220 SOLID ANALYTIC GEOMETRY. Thus OM, Fig. 75, is the projection of OP on the X-axis. KoTE. — The projections… … Fig. 76. Let P {x, y, z) and Y {x, y, z) be the given points. Let L (= PT) be the required length. Draw YG andPN II to OZ; NA and CD || to OY; NB || to OX. Join Nand C and draw PM || to NC. We observe from the figure that L is the hypothenuse of aright angled triangle whose sides are PM and PM,…
Geometry, Analytic
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