INSTITUTO DE MATEMÁTICA
HJB --- GMA --- UFF

X(2567)
(EXSIMILICENTER(NINE-POINT CIRCLE, 2ND BROCARD CIRCLE))


Click here to access the list of all triangle centers.

Interactive Applet

You can move the points A, B and C (click on the point and drag it).
Press the keys “+” and “−” to zoom in or zoom out the visualization window and use the arrow keys to translate it.

You can also construct all centers related with this one (as described in ETC) using the “Run Macro Tool”. To do this, click on the icon Run Macro Tool, select the center name from the list and, then, click on the vertices A, B and C successively.

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Download all construction files and macros: tc.zip (10.1 Mb).
This applet was built with the free and multiplatform dynamic geometry software C.a.R..


Information from Kimberling's Encyclopedia of Triangle Centers

Trilinears           f(A,B,C) : f(B,C,A) : f(C,A,B), where f(A,B,C) = cos A - e cos(B - C), where e = (1 - 4 sin2ω)1/2
Barycentrics    (sin A)f(A,B,C) : (sin B)f(B,C,A) : (sin C)f(C,A,B)

X(2567) lies on these lines:
2,3    11,2565    12,2566    485,2560    486,2561    1329,2569    1342,1348    1343,1349    1670,2039    1671,2040    1676,2558    1677,2559    1698,2572    1699,2573    2009,2562    2010,2563

This is a joint work of
Humberto José Bortolossi, Lis Ingrid Roque Lopes Custódio and Suely Machado Meireles Dias.

If you have questions or suggestions, please, contact us using the e-mail presented here.

Departamento de Matemática Aplicada -- Instituto de Matemática -- Universidade Federal Fluminense



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