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) = (csc A)(-1 + cos B + cos C)[sin 2B + sin 2C + 2(-1 + cos A)(sin B + sin C)]
Barycentrics g(A,B,C) : g(B,C,A) : g(C,A,B) where
g(A,B,C) = (-1 + cos B + cos C)[sin 2B + sin 2C + 2(-1 + cos A)(sin B + sin C)]
X(119) = nine-point-circle-antipode of X(11)
X(119) = X(104)-of-medial triangle.
X(119) lies on these lines:
1,5 2,104 3,123 4,100 10,124 116,142 125,442 135,431 136,429 214,515 381,528 517,908
X(119) = midpoint of X(I) and X(J) for these (I,J): (4,100), (104,153)
X(119) = reflection of X(11) in X(5)
X(119) = complement of X(104)
X(119) = complementary conjugate of X(517)
X(119) = X(4)-Ceva conjugate of X(517)