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X₁₆₇₇¶

EXSIMILICENTER(1st LEMOINE CIRCLE, NINE-POINT CIRCLE)

X₁₆₇₇ is the exsimilicenter(1st Lemoine circle, nine-point circle).

X₁₆₇₇ (EXSIMILICENTER(1st LEMOINE CIRCLE, NINE-POINT CIRCLE)) constructed on acute reference triangle \((a, b, c) = (5, 6, 7)\) with unit baseline AB = \(1\).¶

"""GEOMETOR construction model for X_1677 = EXSIMILICENTER(1st LEMOINE CIRCLE, NINE-POINT CIRCLE)."""

        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,
            isogonal_conjugate,
            nine_point_center_of,
            orthocenter_of,
            promote_point_to_top,
        )
        from geometor.etc.render import write_center_svg


        def construct_x_01677(
            model: Model, A: spg.Point, B: spg.Point, C: spg.Point
        ) -> spg.Point:
            """Construct X_1677 = EXSIMILICENTER(1st LEMOINE CIRCLE, NINE-POINT CIRCLE) on reference triangle ABC."""
            X_1670 = eval_trilinear_point(model, A, B, C, 'sin(A) - cos(A)*cot( omega  /2)', ID="X_1670", classes=["center"])
            X_1677 = isogonal_conjugate(model, A, B, C, X_1670, ID="X_1677", classes=["selected", "target"])
            X_5 = nine_point_center_of(model, A, B, C, ID="X_5", classes=["center", "incident"])
            X_182 = eval_trilinear_point(model, A, B, C, 'cos(A-  omega  )', ID="X_182", classes=["center", "incident"])
            central_line(model, X_5, X_182, 5, 182, incident=True)
            X_2 = centroid_of(model, A, B, C, ID="X_2", classes=["center", "incident"])
            X_1342 = eval_trilinear_point(model, A, B, C, 'sin(A) + cos(A)*cot( omega  /2)', ID="X_1342", classes=["center", "incident"])
            central_line(model, X_2, X_1342, 2, 1342, incident=True)
            X_4 = orthocenter_of(model, A, B, C, ID="X_4", classes=["center", "incident"])
            X_1343 = eval_trilinear_point(model, A, B, C, 'sin(A) - cos(A)*tan( omega  /2)', ID="X_1343", classes=["center", "incident"])
            central_line(model, X_4, X_1343, 4, 1343, incident=True)
            return promote_point_to_top(model, X_1677)


        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_1677 on the given reference triangle."""
            model = create_model('X_1677 = EXSIMILICENTER(1st LEMOINE CIRCLE, NINE-POINT CIRCLE)')
            A, B, C = construct_baseline_triangle(model, *sides, show_guides=show_guides)
            construct_x_01677(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-01677.json"))
            write_center_svg(
                model_acute,
                here / "x-01677.svg",
                subtitle="(a, b, c) = (5, 6, 7) | AB = 1",
            )
        

X1677¶

X₁₆₇₇¶