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) = bc[2a4 - 2(b + c)a3 + (8bc - 3b2 - 3c2)a2
+ 2(b + c)(b - c)2a + (b2 - c2)2]
Barycentrics af(a,b,c) : bf(b,c,a) : cf(c,a,b)
X(1387) lies on these lines:
1,5 2,1000 7,104 30,1319 100,474 106,1086 142,214 149,377 153,1056
X(1387) = midpoint of X(I) and X(J) for these (I,J): (1,11), (80,1317), (1145,1320)
X(1387) = isogonal conjugate of X(1391)
X(1387) = inverse-in-incircle of X(80)
X(1387) = complement of X(1145)
X(1387) = crosssum of X(202) and X(203)