X310

ISOTOMIC CONJUGATE OF X42

< A B C >: Reference Triangle △ABC [ A B ]: Sideline AB (Base c = 1) [ B C ]: Sideline BC (Side a) [ C A ]: Sideline CA (Side b) { 2, 39 }: Central Line L(2, 39) { 38, 75 }: Central Line L(38, 75) { 261, 272 }: Central Line L(261, 272) { 7, 314 }: Central Line L(7, 314) { 86, 350 }: Central Line L(86, 350) { 321, 335 }: Central Line L(321, 335) A = Vertex A (0.0000, 0.0000) B = Vertex B (1.0000, 0.0000) C = Vertex C (0.6122, 0.5999) X_42 = CROSSPOINT OF INCENTER AND SYMMEDIAN POINT (0.5880, 0.2495) X_2 = CENTROID (0.5374, 0.2000) X_39 = BROCARD MIDPOINT (0.5778, 0.2305) X_38 = CROSSPOINT OF X(1) AND X(75) (0.5443, 0.1976) X_75 = ISOTOMIC CONJUGATE OF INCENTER (0.4988, 0.1682) X_261 = ISOTOMIC CONJUGATE OF X(12) (0.5072, 0.1625) X_272 = ISOGONAL CONJUGATE OF X(209) (-0.2458, -0.0534) X_7 = GERGONNE POINT (0.5903, 0.2769) X_314 = ISOTOMIC CONJUGATE OF X(65) (0.4457, 0.1206) X_86 = CEVAPOINT OF INCENTER AND CENTROID (0.5534, 0.2171) X_350 = -HIRST INVERSE OF X(75) (-3.5227, -3.1370) X_321 = ISOTOMIC CONJUGATE OF X(81) (0.4800, 0.1527) X_335 = ISOTOMIC CONJUGATE OF X(239) (1.0387, 0.0318) X_310 = ISOTOMIC CONJUGATE OF X(42) (0.4762, 0.1536) A B C X42 X2 X39 X38 X75 X261 X272 X7 X314 X86 X350 X321 X335 X310 (a, b, c) = (5, 6, 7) | AB = 1

X310 (ISOTOMIC CONJUGATE OF X42) constructed on acute reference triangle \((a, b, c) = (5, 6, 7)\) with unit baseline AB = \(1\).

"""GEOMETOR construction model for X_310 = ISOTOMIC CONJUGATE OF X_42."""

        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,
            centroid_of,
            construct_baseline_triangle,
            create_model,
            eval_trilinear_point,
            promote_point_to_top,
        )
        from geometor.etc.render import write_center_svg


        def construct_x_00310(
            model: Model, A: spg.Point, B: spg.Point, C: spg.Point
        ) -> spg.Point:
            """Construct X_310 = ISOTOMIC CONJUGATE OF X_42 on reference triangle ABC."""
            X_310 = eval_trilinear_point(model, A, B, C, 'b**(3)*c**(3)/(b + c)', ID="X_310", classes=["selected", "target"])
            X_2 = centroid_of(model, A, B, C, ID="X_2", classes=["center", "incident"])
            X_39 = eval_trilinear_point(model, A, B, C, 'a*(b**(2) + c**(2))', ID="X_39", classes=["center", "incident"])
            central_line(model, X_2, X_39, 2, 39, incident=True)
            X_38 = eval_trilinear_point(model, A, B, C, 'b**(2) + c**(2)', ID="X_38", 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_38, X_75, 38, 75, incident=True)
            X_261 = eval_trilinear_point(model, A, B, C, '(((csc(A))*(sec(B/2 - C/2)))**(2))', ID="X_261", classes=["center", "incident"])
            X_272 = eval_trilinear_point(model, A, B, C, '(1/((sin(A) + sin(A - B) + sin(A - C))*(sin(B) + sin(C))))', ID="X_272", classes=["center", "incident"])
            central_line(model, X_261, X_272, 261, 272, incident=True)
            return promote_point_to_top(model, X_310)


        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_310 on the given reference triangle."""
            model = create_model('X_310 = ISOTOMIC CONJUGATE OF X_42')
            A, B, C = construct_baseline_triangle(model, *sides, show_guides=show_guides)
            construct_x_00310(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-00310.json"))
            write_center_svg(
                model_acute,
                here / "x-00310.svg",
                subtitle="(a, b, c) = (5, 6, 7) | AB = 1",
            )