Basic Parameters of the Second Power Point X(31)

Given a triangle , let be the incenter, be the Schiffler point, be the symmedian point, and be the crosspoint of and .
Then the second power point is the intersection of the lines and [1].
Let
, , be the side lengths,
, , be the circumradius, inradius and semiperimeter of ,
,
, , be the exact trilinear coordinates of with respect to and . (The trilinears of are .)
Introduce the parameters , , , in Conway notation, where is the Brocard angle.
Then
,
,
.
You can drag the vertices , and .

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A triangle center is said to be even when its barycentric coordinates can be expressed as a function of three variables , , that all occur with even exponents. If the center of a triangle has constant barycentric coordinates, it is called a neutral center (the centroid is the only neutral center). A triangle center is said to be odd if it is neither even nor neutral.
Standard barycentric coordinates of a point with respect to a reference triangle have a sum of 1.
Reference
[1] C. Kimberling. "Encyclopedia of Triangle Centers." (Oct 13, 2022) faculty.evansville.edu/ck6/encyclopedia.
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