Advanced geometry for high schools : synthetic and analytical (1919)
McDougall, A. H. (Alexander Hiram), 1859-1946 · Toronto : Copp, Clark · leaf 18
c B … In A ABC, draw AX ± BC, BY ± CA, CZ J. AB.To prove that AX, BY, CZ are concurrent. A AZC III A AYB,AZ _ CAYA ~ AB tii^ ABarl^ ZB = BC;^Y _ BCXC CA and 6,sfiZ* % AZYA BXZB CYXC CAAB AB BC _ ,BC CA AZ . BX . CY = ZB . XC . YA :., by § 4, AX, BY, CZ are concurrent. (@/>The point where the J_s from…
Geometry · Geometry, Analytic
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