← etc / Encyclopedia of Triangle Centers

X₂₅₈₆¶

X₃-ISOCONJUGATE OF X₂₅₇₄

X₂₅₈₆ (X₃-ISOCONJUGATE OF X₂₅₇₄) constructed on acute reference triangle \((a, b, c) = (5, 6, 7)\) with unit baseline AB = \(1\).¶

"""GEOMETOR construction model for X_2586 = X_3-ISOCONJUGATE OF X_2574."""

        from __future__ import annotations

        from pathlib import Path

        import sympy.geometry as spg
        from geometor.model import Model

        from geometor.etc.ops import (
            central_line,
            construct_baseline_triangle,
            create_model,
            eval_trilinear_point,
            incenter_of,
            isogonal_conjugate,
            point_from_barycentrics,
            promote_point_to_top,
        )
        from geometor.etc.render import write_center_svg


        def construct_x_02586(
            model: Model, A: spg.Point, B: spg.Point, C: spg.Point
        ) -> spg.Point:
            """Construct X_2586 = X_3-ISOCONJUGATE OF X_2574 on reference triangle ABC."""
            X_2584 = point_from_barycentrics(model, A, B, C, 3.3911992, -2.2826338, -0.10856545, ID="X_2584", classes=["center"])
            X_2586 = isogonal_conjugate(model, A, B, C, X_2584, ID="X_2586", classes=["selected", "target"])
            X_1 = incenter_of(model, A, B, C, ID="X_1", classes=["center", "incident"])
            X_29 = eval_trilinear_point(model, A, B, C, '(sec(A))/(cos(B) + cos(C))', ID="X_29", classes=["center", "incident"])
            central_line(model, X_1, X_29, 1, 29, incident=True)
            X_108 = eval_trilinear_point(model, A, B, C, 'a/(sec(B) - sec(C))', ID="X_108", classes=["center", "incident"])
            X_1113 = eval_trilinear_point(model, A, B, C, '(R - d)*cos(A) - 2*R*cos(B)*cos(C)', ID="X_1113", classes=["center", "incident"])
            central_line(model, X_108, X_1113, 108, 1113, incident=True)
            X_162 = eval_trilinear_point(model, A, B, C, '1/(sin(2*B) - sin(2*C))', ID="X_162", classes=["center", "incident"])
            X_1822 = point_from_barycentrics(model, A, B, C, -0.19858607, 0.24538924, 0.95319683, ID="X_1822", classes=["center", "incident"])
            central_line(model, X_162, X_1822, 162, 1822, incident=True)
            return promote_point_to_top(model, X_2586)


        def build_model(
            sides: tuple[float, float, float] = (5.0, 6.0, 7.0),
            show_guides: bool = False,
        ) -> Model:
            """Build a `geometor.model.Model` for X_2586 on the given reference triangle."""
            model = create_model('X_2586 = X_3-ISOCONJUGATE OF X_2574')
            A, B, C = construct_baseline_triangle(model, *sides, show_guides=show_guides)
            construct_x_02586(model, A, B, C)
            return model


        if __name__ == "__main__":
            here = Path(__file__).resolve().parent
            model_acute = build_model((5.0, 6.0, 7.0))
            model_acute.save(str(here / "x-02586.json"))
            write_center_svg(
                model_acute,
                here / "x-02586.svg",
                subtitle="(a, b, c) = (5, 6, 7) | AB = 1",
            )
        

X2586¶

X₂₅₈₆¶