Advanced geometry for high schools : synthetic and analytical (1919)
McDougall, A. H. (Alexander Hiram), 1859-1946 · Toronto : Copp, Clark · leaf 26
KD= ZOKL, and SKO is a st. line; LKD is a st. line K is the middle point of the hypotenuse of thert.-Zd A LDK; the circle with centre K and radius KL passesthrough X. Similarly this circle passes through Y and Z. the nine points L, M, N, D, E, F, X, Y, Z are concyclic. Cor. 1:—The centre of the… … 11. If any point is taken on the circumference ofthe circumscribed circle of a triangle, the projectionsof this point on the three sides of the triangle arecollinear. Let P be any point on thecircle ABC, X, Y, Z, the pro-jections of P on BC, CA, ABrespectively. It is required to show thatX, Y, Z…
Geometry · Geometry, Analytic
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