Newcomb, Simon, 1835-1909 · New York, H. Holt and company · leaf 114
98 PLANE ANALYTIC GEOMETRY. Centres of Similitude. 84. Def. The line joining the centres of two circles iscalled their central line. … Theorem. If the ends of parallel radii of two circles hejoined ly straight lines, these lines tuill all 2^(^ss through acommon point on the central line. Proof. Let GP and CP be any two parallel radii, and8 the point in which the line PP intersects the line CCjoining the centres. The similar…
Geometry, Analytic
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