392. [K. 2. e.] A Nine-point Circle
نویسندگان
چکیده
منابع مشابه
Perspective Isoconjugate Triangle Pairs, Hofstadter Pairs, and Crosssums on the Nine-Point Circle
The r-Hofstadter triangle and the (1 − r)-Hofstadter triangle are proved perspective, and homogeneous trilinear coordinates are found for the perspector. More generally, given a triangle DEF inscribed in a reference triangle ABC, triangles A′B′C′ and A′′B′′C′′ derived in a certain manner from DEF are perspective to each other and to ABC. Trilinears for the three perspectors, denoted by P ∗, P1,...
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ژورنال
عنوان ژورنال: The Mathematical Gazette
سال: 1913
ISSN: 0025-5572,2056-6328
DOI: 10.2307/3603301