 # Basic Parameters of the Second Isodynamic Point

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A triangle has two isodynamic points, defined by the property that their pedal triangles are equilateral. The second isodynamic point is the isogonal conjugate of the second Fermat point .

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Let , , be the side lengths, , , be the circumradius, inradius and semiperimeter of , , , , be the exact trilinear coordinates of with respect to and .

Introduce the parameters , , , in Conway notation, where is the Brocard angle.

Then , , .

You can drag the vertices , and .

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Contributed by: Minh Trinh Xuan (January 2023)
Open content licensed under CC BY-NC-SA

## Snapshots   ## Details

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

 C. Kimberling. "Encyclopedia of Triangle Centers." (Sep 27, 2022) faculty.evansville.edu/ck6/encyclopedia.

## Permanent Citation

Minh Trinh Xuan

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