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X₉₉₀¶

INTERSECTION OF LINES X₁X_7 AND X₃X_37

X₉₉₀ = complement, wrt hexyl triangle, of X₁₂₇₁₇

X₉₉₀ (INTERSECTION OF LINES X₁X_7 AND X₃X_37) constructed on acute reference triangle \((a, b, c) = (5, 6, 7)\) with unit baseline AB = \(1\).¶

"""GEOMETOR construction model for X_990 = INTERSECTION OF LINES X_1X_7 AND X_3X_37."""

        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,
            gergonne_point_of,
            incenter_of,
            promote_point_to_top,
        )
        from geometor.etc.render import write_center_svg


        def construct_x_00990(
            model: Model, A: spg.Point, B: spg.Point, C: spg.Point
        ) -> spg.Point:
            """Construct X_990 = INTERSECTION OF LINES X_1X_7 AND X_3X_37 on reference triangle ABC."""
            X_990 = eval_trilinear_point(model, A, B, C, '(a**(5) - a**(4)*(b + c) - 2*a**(3)*b*c - a*(b - c)**(2)*(b**(2) + c**(2)) + (b - c)**(2)*(b + c)**(3))', ID="X_990", classes=["selected", "target"])
            X_1 = incenter_of(model, A, B, C, ID="X_1", classes=["center", "incident"])
            X_7 = gergonne_point_of(model, A, B, C, ID="X_7", classes=["center", "incident"])
            central_line(model, X_1, X_7, 1, 7, incident=True)
            X_3 = circumcenter_of(model, A, B, C, ID="X_3", classes=["center", "incident"])
            X_37 = eval_trilinear_point(model, A, B, C, 'b + c', ID="X_37", classes=["center", "incident"])
            central_line(model, X_3, X_37, 3, 37, incident=True)
            X_33 = eval_trilinear_point(model, A, B, C, '1 + sec(A)', ID="X_33", 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_33, X_57, 33, 57, incident=True)
            return promote_point_to_top(model, X_990)


        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_990 on the given reference triangle."""
            model = create_model('X_990 = INTERSECTION OF LINES X_1X_7 AND X_3X_37')
            A, B, C = construct_baseline_triangle(model, *sides, show_guides=show_guides)
            construct_x_00990(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-00990.json"))
            write_center_svg(
                model_acute,
                here / "x-00990.svg",
                subtitle="(a, b, c) = (5, 6, 7) | AB = 1",
            )
        

X990¶

X₉₉₀¶