Advanced geometry for high schools : synthetic and analytical (1919)
McDougall, A. H. (Alexander Hiram), 1859-1946 · Toronto : Copp, Clark · leaf 21
, B&Lare As having AB, ab, MLconcurrent at N; corres-ponding sides aM, bLmeetat c; MA, LB at C; Aa,Bb at O. .*., by (a), c,C, O are collinear, i.e., Aa,N Bb, Cc are concurrent.) Fig. 11. (Historical Notb :—Girard Desargues (1593-1662) was an architect and engineer ofLyons, France.) 16. The… … EXERCISES 9 17. Tangents to the circumcircle at A, B, C, meet BC,CA, AB respectively in collinear points. (Note.—Use Ex. 8 and Ex. 15 (a).) 18. Given the base and vertical Z. of a A, find the locusof its orthocentre. 19. If the base BC and vertical L A of a A ABC begiven, and the base be trisected…
Geometry · Geometry, Analytic
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