← etc / Encyclopedia of Triangle Centers

X₂₉₅¶

ISOGONAL CONJUGATE OF X₂₄₂

X₂₉₅ (ISOGONAL CONJUGATE OF X₂₄₂) constructed on acute reference triangle \((a, b, c) = (5, 6, 7)\) with unit baseline AB = \(1\).¶

"""GEOMETOR construction model for X_295 = ISOGONAL CONJUGATE OF X_242."""

        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,
        )
        from geometor.etc.render import write_center_svg


        def construct_x_00295(
            model: Model, A: spg.Point, B: spg.Point, C: spg.Point
        ) -> spg.Point:
            """Construct X_295 = ISOGONAL CONJUGATE OF X_242 on reference triangle ABC."""
            X_242 = eval_trilinear_point(model, A, B, C, '((sec(A))*((sin(A))**(2) - sin(B)*sin(C)))', ID="X_242", classes=["center"])
            X_295 = isogonal_conjugate(model, A, B, C, X_242, ID="X_295", classes=["selected", "target"])
            X_43 = eval_trilinear_point(model, A, B, C, 'a*b + a*c - b*c', ID="X_43", 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_43, X_57, 43, 57, incident=True)
            X_58 = eval_trilinear_point(model, A, B, C, 'a/(b + c)', ID="X_58", classes=["center", "incident"])
            X_101 = eval_trilinear_point(model, A, B, C, 'a/(b - c)', ID="X_101", classes=["center", "incident"])
            central_line(model, X_58, X_101, 58, 101, incident=True)
            X_27 = eval_trilinear_point(model, A, B, C, '(sec(A))/(b + c)', ID="X_27", classes=["center", "incident"])
            X_335 = eval_trilinear_point(model, A, B, C, 'b*c/(a**(2) - b*c)', ID="X_335", classes=["center", "incident"])
            central_line(model, X_27, X_335, 27, 335, incident=True)
            return promote_point_to_top(model, X_295)


        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_295 on the given reference triangle."""
            model = create_model('X_295 = ISOGONAL CONJUGATE OF X_242')
            A, B, C = construct_baseline_triangle(model, *sides, show_guides=show_guides)
            construct_x_00295(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-00295.json"))
            write_center_svg(
                model_acute,
                here / "x-00295.svg",
                subtitle="(a, b, c) = (5, 6, 7) | AB = 1",
            )
        

X295¶

X₂₉₅¶