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X₃₈₀¶

INTERSECTION OF LINES X₁X_19 AND X₉X_55

X₃₈₀ (INTERSECTION OF LINES X₁X_19 AND X₉X_55) constructed on acute reference triangle \((a, b, c) = (5, 6, 7)\) with unit baseline AB = \(1\).¶

"""GEOMETOR construction model for X_380 = INTERSECTION OF LINES X_1X_19 AND X_9X_55."""

        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,
            incenter_of,
            mittenpunkt_of,
            promote_point_to_top,
            symmedian_point_of,
        )
        from geometor.etc.render import write_center_svg


        def construct_x_00380(
            model: Model, A: spg.Point, B: spg.Point, C: spg.Point
        ) -> spg.Point:
            """Construct X_380 = INTERSECTION OF LINES X_1X_19 AND X_9X_55 on reference triangle ABC."""
            X_380 = eval_trilinear_point(model, A, B, C, '((b + c - a)*(3*a**(3) + (b + c)*(3*a**(2) + (b - c)**(2) + a*(b + c))))', ID="X_380", classes=["selected", "target"])
            X_1 = incenter_of(model, A, B, C, ID="X_1", classes=["center", "incident"])
            X_19 = eval_trilinear_point(model, A, B, C, 'tan(A)', ID="X_19", classes=["center", "incident"])
            central_line(model, X_1, X_19, 1, 19, incident=True)
            X_6 = symmedian_point_of(model, A, B, C, ID="X_6", classes=["center", "incident"])
            X_40 = eval_trilinear_point(model, A, B, C, 'cos(B) + cos(C) - cos(A) - 1', ID="X_40", classes=["center", "incident"])
            central_line(model, X_6, X_40, 6, 40, incident=True)
            X_9 = mittenpunkt_of(model, A, B, C, ID="X_9", classes=["center", "incident"])
            X_55 = eval_trilinear_point(model, A, B, C, 'a*(b + c - a)', ID="X_55", classes=["center", "incident"])
            central_line(model, X_9, X_55, 9, 55, incident=True)
            return promote_point_to_top(model, X_380)


        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_380 on the given reference triangle."""
            model = create_model('X_380 = INTERSECTION OF LINES X_1X_19 AND X_9X_55')
            A, B, C = construct_baseline_triangle(model, *sides, show_guides=show_guides)
            construct_x_00380(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-00380.json"))
            write_center_svg(
                model_acute,
                here / "x-00380.svg",
                subtitle="(a, b, c) = (5, 6, 7) | AB = 1",
            )
        

X380¶

X₃₈₀¶