Osgood, William F. (William Fogg), 1864-1943, Graustein, William C. (William Caspar), 1888-1941, joint author · New York : The Macmillan Company · leaf 73
egiven is simple, providedone remembers the con-struction lines it is desir-able to draw. By means,however, of Analytic Ge-ometry we can establish j?;(-i,3)the proposition, not byartifices, but by the naturaland direct application ofthe general principle enun-ciated in the precedingparagraph. The… … j5.(4,0) APPLICATIONS 55 to take one of the axes along a side of the triangle. Let thishe the axis of x. A good choice for the axis of y will be one in which thisaxis passes through a vertex. Let this be the vertex not onthe axis of x. We begin with a numerical case, choosing the vertices A, B,C at…
