Projective geometry for use in colleges and schools (1911)
Milne, William P. (William Proctor), 1881- · London : Macmillan · leaf 51
ion will nowbe required: If A, B and 0, D be two given pairs of points lying onthe same straight line, then, in general, one and only onepair of points X, Y can be found on the given line suchthat X, Y harmonically separate both A, B and 0, D.(-3) To find XY, describe circles on AB and CD… … Fig. 16. harmonically separate X and Y.and D. Similarly with C The following considerations are important in whatfollows: // the circles described on AB and CD do not cut inreed points as in the figure, X and Y ivill he real. If the circles described on AB and CD cut in realpoints, X and Y will be…
Geometry, Projective
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