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 , 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) = a[a3(b + c) - a2(b2 - bc + c2) - a(b + c)(b2 + c2) + (b - c)(b3 - c3)]
Barycentrics g(a,b,c) : g(b,c,a) : g(c,a,b), where g(a,b,c) = af(a,b,c)
X(991) lies on these lines:
1,7 3,6 35,255 37,971 42,165 55,103 57,955 995,1064
X(991) = reflection of X(573) in X(3)
X(991) = crossdifference of any two points on line X(523)X(657)