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

X(1975)
(CROSSSUM OF PU(39))


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 B cos C + (bc cos2A)/a2
Barycentrics    af(a,b,c) : bf(b,c,a) : cf(c,a,b)

X(1975) lies on these lines:
3,76    4,325    6,194    20,64    25,305    30,315    32,538    56,350    75,958    190,220    221,664    264,1105    274,405    310,1011    316,382    378,1235    394,401    543,626    801,1073

X(1975) = midpoint of X(489) and X(490)
X(1975) = X(I)-Ceva conjugate of X(J) for these (I,J): (287,325), (801,69)
X(1975) = cevapoint of X(20) and X(194)

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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