Dowling, L. Wayland (Linnaeus Wayland), b. 1867, Turneaure, F. E. (Frederick Eugene), 1866- · New York, H. Holt and company · leaf 234
es of the normal to a plane passingthrough three given points are proportional to the cofactors correspondingto X, y, and z in the determinant form of its equation. 4. Show that the cofactors corresponding to x, ?/, and z are proportionalto the areas of the projections of the triangle whose… … Fig. 130 Pj = (xi, yi, Zi), it is required to find the length of the perpendic-ular DPi, where Z) is a point in the plane ABC and P^ lies outsideof this plane. If the equation of the plane is not in the normal 218 THE PLANE [Chap. XIII. form, reduce it to that form (Art. 160) so that the equation…
Geometry, Analytic
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