X3237

INTERSECTION OF LINES X1X_256 and X3X_1673

< 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) { 1, 256 }: Central Line L(1, 256) { 3, 1673 }: Central Line L(3, 1673) { 6, 1672 }: Central Line L(6, 1672) { 55, 1671 }: Central Line L(55, 1671) { 56, 1670 }: Central Line L(56, 1670) { 1124, 1689 }: Central Line L(1124, 1689) A = Vertex A (0.0000, 0.0000) B = Vertex B (1.0000, 0.0000) C = Vertex C (0.6122, 0.5999) X_1 = INCENTER (0.5714, 0.2333) X_256 = 1st SHARYGIN POINT (0.5601, 0.2146) X_3 = CIRCUMCENTER (0.5000, 0.1021) X_1673 = EXSIMILICENTER(INCIRCLE, 1st LEMOINE CIRCLE) (0.6607, 0.4358) X_6 = SYMMEDIAN POINT (LEMOINE POINT, GREBE POINT) (0.6000, 0.2672) X_1672 = INSIMILICENTER(INCIRCLE, 1st LEMOINE CIRCLE) (0.5619, 0.2116) X_55 = INSIMILICENTER(CIRCUMCIRCLE, INCIRCLE) (0.5490, 0.1921) X_1671 = INVERSE-IN-BROCARD-CIRCLE OF X(1343) (0.5882, 0.2477) X_56 = EXSIMILICENTER(CIRCUMCIRCLE, INCIRCLE) (0.6316, 0.3438) X_1670 = INVERSE-IN-BROCARD-CIRCLE OF X(1342) (0.4118, -0.0436) X_1124 = ISOGONAL CONJUGATE OF X(1123) (0.5846, 0.2489) X_1689 = INVERSE-IN-BROCARD-CIRCLE OF X(1687) (0.6471, 0.3451) X_3237 = INTERSECTION OF LINES X(1)X(256) and X(3)X(1673) (0.5311, 0.1667) A B C X1 X256 X3 X1673 X6 X1672 X55 X1671 X56 X1670 X1124 X1689 X3237 (a, b, c) = (5, 6, 7) | AB = 1

X3237 (INTERSECTION OF LINES X1X_256 and X3X_1673) constructed on acute reference triangle \((a, b, c) = (5, 6, 7)\) with unit baseline AB = \(1\).

"""GEOMETOR construction model for X_3237 = INTERSECTION OF LINES X_1X_256 and X_3X_1673."""

        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,
            circumcenter_of,
            construct_baseline_triangle,
            create_model,
            eval_trilinear_point,
            incenter_of,
            promote_point_to_top,
            symmedian_point_of,
        )
        from geometor.etc.render import write_center_svg


        def construct_x_03237(
            model: Model, A: spg.Point, B: spg.Point, C: spg.Point
        ) -> spg.Point:
            """Construct X_3237 = INTERSECTION OF LINES X_1X_256 and X_3X_1673 on reference triangle ABC."""
            X_3237 = eval_trilinear_point(model, A, B, C, '(1 + cos(A +  omega  ))', ID="X_3237", classes=["selected", "target"])
            X_1 = incenter_of(model, A, B, C, ID="X_1", classes=["center", "incident"])
            X_256 = eval_trilinear_point(model, A, B, C, '1/(a**(2) + b*c)', ID="X_256", classes=["center", "incident"])
            central_line(model, X_1, X_256, 1, 256, incident=True)
            X_3 = circumcenter_of(model, A, B, C, ID="X_3", classes=["center", "incident"])
            X_1673 = eval_trilinear_point(model, A, B, C, '1 - cos(A -  omega  )', ID="X_1673", classes=["center", "incident"])
            central_line(model, X_3, X_1673, 3, 1673, incident=True)
            X_6 = symmedian_point_of(model, A, B, C, ID="X_6", classes=["center", "incident"])
            X_1672 = eval_trilinear_point(model, A, B, C, '1 + cos(A -  omega  )', ID="X_1672", classes=["center", "incident"])
            central_line(model, X_6, X_1672, 6, 1672, incident=True)
            return promote_point_to_top(model, X_3237)


        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_3237 on the given reference triangle."""
            model = create_model('X_3237 = INTERSECTION OF LINES X_1X_256 and X_3X_1673')
            A, B, C = construct_baseline_triangle(model, *sides, show_guides=show_guides)
            construct_x_03237(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-03237.json"))
            write_center_svg(
                model_acute,
                here / "x-03237.svg",
                subtitle="(a, b, c) = (5, 6, 7) | AB = 1",
            )