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X₅₅₀¶

MIDPOINT OF X₃ AND X₂₀

X₅₅₀ is the midpoint of X₃ and X₂₀.

X₅₅₀ (MIDPOINT OF X₃ AND X₂₀) constructed on acute reference triangle \((a, b, c) = (5, 6, 7)\) with unit baseline AB = \(1\).¶

"""GEOMETOR construction model for X_550 = MIDPOINT OF X_3 AND X_20."""

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


        def construct_x_00550(
            model: Model, A: spg.Point, B: spg.Point, C: spg.Point
        ) -> spg.Point:
            """Construct X_550 = MIDPOINT OF X_3 AND X_20 on reference triangle ABC."""
            X_3 = circumcenter_of(model, A, B, C, ID="X_3", classes=["center"])
            X_20 = eval_trilinear_point(model, A, B, C, 'cos(A) - cos(B)*cos(C)', ID="X_20", classes=["center"])
            X_550 = midpoint(model, X_3, X_20, ID="X_550", classes=["selected", "target"], guide=False)
            X_2 = centroid_of(model, A, B, C, ID="X_2", classes=["center"])
            central_line(model, X_2, X_3, 2, 3)
            X_15 = eval_trilinear_point(model, A, B, C, 'sin(A +  pi  /3)', ID="X_15", classes=["center", "incident"])
            X_397 = eval_trilinear_point(model, A, B, C, 'cos(B - C) - 2*cos(A +  pi  /3)', ID="X_397", classes=["center", "incident"])
            central_line(model, X_15, X_397, 15, 397, incident=True)
            X_16 = eval_trilinear_point(model, A, B, C, 'sin(A-  pi  /3)', ID="X_16", classes=["center", "incident"])
            X_398 = eval_trilinear_point(model, A, B, C, 'cos(B - C) - 2*cos(A -  pi  /3)', ID="X_398", classes=["center", "incident"])
            central_line(model, X_16, X_398, 16, 398, incident=True)
            return promote_point_to_top(model, X_550)


        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_550 on the given reference triangle."""
            model = create_model('X_550 = MIDPOINT OF X_3 AND X_20')
            A, B, C = construct_baseline_triangle(model, *sides, show_guides=show_guides)
            construct_x_00550(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-00550.json"))
            write_center_svg(
                model_acute,
                here / "x-00550.svg",
                subtitle="(a, b, c) = (5, 6, 7) | AB = 1",
            )
        

X550¶

X₅₅₀¶