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) = (sin2A/2)(cos B + cos C - cos A - 1)
Barycentrics (sin A)f(A,B,C) : (sin B)f(B,C,A) : (sin C)f(C,A,B)
X(221) lies on these lines:
1,84 3,102 6,19 8,651 31,56 40,223 55,64 201,220 204,207 960,1038
X(221) = isogonal conjugate of X(280)
X(221) = X(I)-Ceva conjugate of X(J) for these (I,J): (1,56), (222,6), (223,198)
X(221) = crosspoint of X(I) and X(J) for these (I,J): (1,40), (196,347)
X(221) = crosssum of X(1) and X(84)
X(221) = X(I)-beth conjugate of X(J) for these (I,J): (1,34), (40,40), (101,220), (109,221), (110,3)