Orthocentroidal Circle = Circumcircle of the Fourth Brocard Triangle.

Orthocentroidal Circle = Nine-Point Circle of the Excentral Triangle of the Fourth Brocard Triangle.

Orthocentroidal Circle = Nine-Point Circle of the Anticomplementary Triangle of the Fourth Brocard Triangle.

The Orthocentroidal Circle is congruent to the Bevan Circle of the Medial Triangle of the Fourth Brocard Triangle.

The Orthocentroidal Circle is congruent to the Bevan Circle of the Orthic Triangle of the Fourth Brocard Triangle.

The Orthocentroidal Circle is congruent to the Orthocentroidal Circle of the Anticomplementary Triangle of the Euler Triangle.

The Orthocentroidal Circle is congruent to the Bevan Circle of the Fourth Brocard Triangle of the Medial Triangle.

The Orthocentroidal Circle is congruent to the Orthocentroidal Circle of the Euler Triangle of the Anticomplementary Triangle.

The Orthocentroidal Circle is congruent to the Nine-Point Circle of the Fourth Brocard Triangle of the Anticomplementary Triangle.

The Orthocentroidal Circle is congruent to the Bevan Circle of the Fourth Brocard Triangle of the Euler Triangle.

The Orthocentroidal Circle is congruent to the Bevan Circle of the Euler Triangle of the Fourth Brocard Triangle.

The Orthocentroidal Circle is congruent to the Bevan Circle of the Feuerbach Triangle of the Fourth Brocard Triangle.