A treatise on special or elementary geometry (1877)
Olney, Edward, 1827-1887, Olney, Edward, 1827-1887. Elements of trigonometry, plane and spherical · New York : Sheldon · leaf 344
Fig. 5-20. CENTRES OF SIMILITUDE. 1029. Def.—If the line joining the centres of two circles bedivided externally, as at c,ai^d internally, as at c,in the ratio of the radii,these points are respectivelythe External and the In-ternal Centres of Sim-ilitude of the two cir-cles. III.—If CO : CO:: EO :… … Fig. 521. 326 INTRODUCTION TO MODERN GEOMETRY. The student should construct the figure when the circles are tangent exter-nally,—when they are tangent internally,—and when one is wholly within theother. Query.—How are the centres of similitude situated in the three differentrelative positions of…
Geometry · Trigonometry
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