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Mathematical Education, 2016, Issue 3(79), Pages 38–48 (Mi mo578)  
Students and teachers of secondary school

Euler Circles of Intriangles and Extriangles

E. D. Kulanina, N. Shihova

a Moscow City University of Psychology and Pedagogics
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Abstract: Given a triangle, let us define the "intriangle" with the vertices at the tangent points of the incircle of the given triangle, and "extriangles" with the vertices at tangent points of the excircles of the given triangle. Euler circles of intriangles and extriangles are studied.
Keywords: inscribed circle excircle, Euler circle.
Document Type: Popular science or education materials
UDC: 514.112.3
Language: Russian
Citation: E. D. Kulanin, N. Shihova, “Euler Circles of Intriangles and Extriangles”, Math. Ed., 2016, no. 3(79), 38–48
Citation in format AMSBIB
\Bibitem{KulShi16}
\by E.~D.~Kulanin, N.~Shihova
\paper Euler Circles of Intriangles and
Extriangles
\jour Math. Ed.
\yr 2016
\issue 3(79)
\pages 38--48
\mathnet{http://mi.mathnet.ru/mo578}
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