Interactive Applet |
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 (y + z) sec A : (z + x) sec B : (x + y) sec C, x : y : z = X(12)
Barycentrics (y + z) tan A : (z + x) tan B : (x + y) tan C, x : y : z = X(12)
X(1831) lies on these lines: 4,80 28,501 33,1697 225,1871 1829,1842 1835,1838 1839,1858 1844,1870
X(1831) = crosspoint of X(4) and X(270)
X(1831) = crosssum of X(3) and X(201)