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X₈₄₄¶

INTERSECTION OF LINES X₁₆₆X_167 AND X₁₇₃X_503

X₈₄₄ = X₇₅-of-excentral-triangle

X₈₄₄ (INTERSECTION OF LINES X₁₆₆X_167 AND X₁₇₃X_503) constructed on acute reference triangle \((a, b, c) = (5, 6, 7)\) with unit baseline AB = \(1\).¶

"""GEOMETOR construction model for X_844 = INTERSECTION OF LINES X_166X_167 AND X_173X_503."""

        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,
            intersect_lines,
            point_from_barycentrics,
            promote_point_to_top,
        )
        from geometor.etc.render import write_center_svg


        def construct_x_00844(
            model: Model, A: spg.Point, B: spg.Point, C: spg.Point
        ) -> spg.Point:
            """Construct X_844 = INTERSECTION OF LINES X_166X_167 AND X_173X_503 on reference triangle ABC."""
            X_166 = eval_trilinear_point(model, A, B, C, '((tan(A/2))/(cos(B/2) + cos(C/2) - cos(A/2)) - (tan(B/2))/(cos(C/2) + cos(A/2) - cos(B/2)) - (tan(C/2))/(cos(A/2) + cos(B/2) - cos(C/2)))', ID="X_166", classes=["center"])
            X_167 = point_from_barycentrics(model, A, B, C, 0.58849841, 0.49152493, -0.080023337, ID="X_167", classes=["center"])
            X_173 = eval_trilinear_point(model, A, B, C, 'cos(B/2) + cos(C/2) - cos(A/2)', ID="X_173", classes=["center"])
            X_503 = eval_trilinear_point(model, A, B, C, '(sec(B/2) + sec(C/2) - sec(A/2))', ID="X_503", classes=["center"])
            central_line(model, X_166, X_167, 166, 167)
            central_line(model, X_173, X_503, 173, 503)
            X_844 = intersect_lines(model, X_166, X_167, X_173, X_503, ID="X_844", classes=["selected", "target"])
            return promote_point_to_top(model, X_844)


        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_844 on the given reference triangle."""
            model = create_model('X_844 = INTERSECTION OF LINES X_166X_167 AND X_173X_503')
            A, B, C = construct_baseline_triangle(model, *sides, show_guides=show_guides)
            construct_x_00844(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-00844.json"))
            write_center_svg(
                model_acute,
                here / "x-00844.svg",
                subtitle="(a, b, c) = (5, 6, 7) | AB = 1",
            )
        

X844¶

X₈₄₄¶