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 , select the center name from the list and, then, click on the vertices A, B and C successively.
|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)/(cos B + cos C)
Barycentrics g(a,b,c) : g(b,c,a) : g(c,a,b), where g(a,b,c) = af(a,b,c)
X(1021) lies on these lines:
1,647 239,514 243,522 333,1024 521,650 648,1020
X(1021) = isogonal conjugate of X(1020)
X(1021) = crosspoint of X(81) and X(162)
X(1021) = crosssum of X(I) and X(J) for these (I,J): (37,656), (65,661), (73,822), (647,1425), (649,1104)
X(1021) = crossdifference of any two points on line X(42)X(65)