← etc / Encyclopedia of Triangle Centers

X₁₂₂₄¶

ISOGONAL CONJUGATE OF X₁₂₀₃

X₁₂₂₄ is the isogonal conjugate of X₁₂₀₃.

X₁₂₂₄ (ISOGONAL CONJUGATE OF X₁₂₀₃) constructed on acute reference triangle \((a, b, c) = (5, 6, 7)\) with unit baseline AB = \(1\).¶

"""GEOMETOR construction model for X_1224 = ISOGONAL CONJUGATE OF X_1203."""

        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,
            promote_point_to_top,
            spieker_center_of,
        )
        from geometor.etc.render import write_center_svg


        def construct_x_01224(
            model: Model, A: spg.Point, B: spg.Point, C: spg.Point
        ) -> spg.Point:
            """Construct X_1224 = ISOGONAL CONJUGATE OF X_1203 on reference triangle ABC."""
            X_1203 = eval_trilinear_point(model, A, B, C, '(a*((a + b + c)**(2) - b*c))', ID="X_1203", classes=["center"])
            X_1224 = isogonal_conjugate(model, A, B, C, X_1203, ID="X_1224", classes=["selected", "target"])
            X_12 = eval_trilinear_point(model, A, B, C, '1 + cos(B - C)', ID="X_12", classes=["center", "incident"])
            X_57 = eval_trilinear_point(model, A, B, C, '1/(b + c - a)', ID="X_57", classes=["center", "incident"])
            central_line(model, X_12, X_57, 12, 57, incident=True)
            X_10 = spieker_center_of(model, A, B, C, ID="X_10", classes=["center", "incident"])
            X_81 = eval_trilinear_point(model, A, B, C, '1/(b + c)', ID="X_81", classes=["center", "incident"])
            central_line(model, X_10, X_81, 10, 81, incident=True)
            X_274 = eval_trilinear_point(model, A, B, C, 'b**(2)*c**(2)/(b + c)', ID="X_274", classes=["center", "incident"])
            X_313 = eval_trilinear_point(model, A, B, C, '(b + c)*b**(3)*c**(3)', ID="X_313", classes=["center", "incident"])
            central_line(model, X_274, X_313, 274, 313, incident=True)
            return promote_point_to_top(model, X_1224)


        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_1224 on the given reference triangle."""
            model = create_model('X_1224 = ISOGONAL CONJUGATE OF X_1203')
            A, B, C = construct_baseline_triangle(model, *sides, show_guides=show_guides)
            construct_x_01224(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-01224.json"))
            write_center_svg(
                model_acute,
                here / "x-01224.svg",
                subtitle="(a, b, c) = (5, 6, 7) | AB = 1",
            )
        

X1224¶

X₁₂₂₄¶