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X₁₂₁₈¶

ISOGONAL CONJUGATE OF X₁₁₈₅

X₁₂₁₈ is the isogonal conjugate of X₁₁₈₅.

X₁₂₁₈ (ISOGONAL CONJUGATE OF X₁₁₈₅) constructed on acute reference triangle \((a, b, c) = (5, 6, 7)\) with unit baseline AB = \(1\).¶

"""GEOMETOR construction model for X_1218 = ISOGONAL CONJUGATE OF X_1185."""

        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,
            isogonal_conjugate,
            point_from_barycentrics,
            promote_point_to_top,
            symmedian_point_of,
        )
        from geometor.etc.render import write_center_svg


        def construct_x_01218(
            model: Model, A: spg.Point, B: spg.Point, C: spg.Point
        ) -> spg.Point:
            """Construct X_1218 = ISOGONAL CONJUGATE OF X_1185 on reference triangle ABC."""
            X_1185 = point_from_barycentrics(model, A, B, C, 0.20754545, 0.32614545, 0.4663091, ID="X_1185", classes=["center"])
            X_1218 = isogonal_conjugate(model, A, B, C, X_1185, ID="X_1218", classes=["selected", "target"])
            X_37 = eval_trilinear_point(model, A, B, C, 'b + c', ID="X_37", classes=["center", "incident"])
            X_76 = eval_trilinear_point(model, A, B, C, '1/a**(3)', ID="X_76", classes=["center", "incident"])
            central_line(model, X_37, X_76, 37, 76, incident=True)
            X_42 = eval_trilinear_point(model, A, B, C, 'a*(b + c)', ID="X_42", classes=["center", "incident"])
            X_75 = eval_trilinear_point(model, A, B, C, '1/a**(2)', ID="X_75", classes=["center", "incident"])
            central_line(model, X_42, X_75, 42, 75, incident=True)
            X_6 = symmedian_point_of(model, A, B, C, ID="X_6", classes=["center", "incident"])
            X_274 = eval_trilinear_point(model, A, B, C, 'b**(2)*c**(2)/(b + c)', ID="X_274", classes=["center", "incident"])
            central_line(model, X_6, X_274, 6, 274, incident=True)
            return promote_point_to_top(model, X_1218)


        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_1218 on the given reference triangle."""
            model = create_model('X_1218 = ISOGONAL CONJUGATE OF X_1185')
            A, B, C = construct_baseline_triangle(model, *sides, show_guides=show_guides)
            construct_x_01218(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-01218.json"))
            write_center_svg(
                model_acute,
                here / "x-01218.svg",
                subtitle="(a, b, c) = (5, 6, 7) | AB = 1",
            )
        

X1218¶

X₁₂₁₈¶