X3696

X991com(EXTOUCH TRIANGLE)

X3696 = midpoint of X8 and X75
< A B C >: Reference Triangle △ABC [ A B ]: Sideline AB (Base c = 1) [ B C ]: Sideline BC (Side a) [ C A ]: Sideline CA (Side b) { 8, 75 }: Gergonne–Nagel Line { 7, 8 }: Gergonne–Nagel Line { 10, 37 }: Central Line L(10, 37) { 210, 321 }: Central Line L(210, 321) { 536, 984 }: Central Line L(536, 984) A = Vertex A (0.0000, 0.0000) B = Vertex B (1.0000, 0.0000) C = Vertex C (0.6122, 0.5999) X_8 = NAGEL POINT (0.4694, 0.1333) X_75 = ISOTOMIC CONJUGATE OF INCENTER (0.4988, 0.1682) X_7 = GERGONNE POINT (0.5903, 0.2769) X_10 = SPIEKER CENTER (0.5204, 0.1833) X_37 = CROSSPOINT OF INCENTER AND CENTROID (0.5567, 0.2158) X_210 = -CEVA CONJUGATE OF X(37) (0.4925, 0.1466) X_321 = ISOTOMIC CONJUGATE OF X(81) (0.4800, 0.1527) X_536 = DIRECTION OF VECTOR AX + BX + CX, where X = X(37) (0.0840, -0.1727) X_984 = MIDPOINT OF X(8) AND X(192) (0.5421, 0.1984) X_3696 = com(EXTOUCH TRIANGLE) (0.4841, 0.1507) A B C X8 X75 X7 X10 X37 X210 X321 X536 X984 X3696 (a, b, c) = (5, 6, 7) | AB = 1

X3696 (X991com(EXTOUCH TRIANGLE)) constructed on acute reference triangle \((a, b, c) = (5, 6, 7)\) with unit baseline AB = \(1\).

"""GEOMETOR construction model for X_3696 = X_991com(EXTOUCH TRIANGLE)."""

        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,
            gergonne_point_of,
            midpoint,
            nagel_point_of,
            promote_point_to_top,
            spieker_center_of,
        )
        from geometor.etc.render import write_center_svg


        def construct_x_03696(
            model: Model, A: spg.Point, B: spg.Point, C: spg.Point
        ) -> spg.Point:
            """Construct X_3696 = X_991com(EXTOUCH TRIANGLE) on reference triangle ABC."""
            X_8 = nagel_point_of(model, A, B, C, ID="X_8", classes=["center"])
            X_75 = eval_trilinear_point(model, A, B, C, '1/a**(2)', ID="X_75", classes=["center"])
            X_3696 = midpoint(model, X_8, X_75, ID="X_3696", classes=["selected", "target"], guide=False)
            X_7 = gergonne_point_of(model, A, B, C, ID="X_7", classes=["center", "incident"])
            central_line(model, X_7, X_8, 7, 8, incident=True)
            X_10 = spieker_center_of(model, A, B, C, ID="X_10", classes=["center", "incident"])
            X_37 = eval_trilinear_point(model, A, B, C, 'b + c', ID="X_37", classes=["center", "incident"])
            central_line(model, X_10, X_37, 10, 37, incident=True)
            X_210 = eval_trilinear_point(model, A, B, C, '(b + c)*(b + c - a)', ID="X_210", classes=["center", "incident"])
            X_321 = eval_trilinear_point(model, A, B, C, '(b + c)*b**(2)*c**(2)', ID="X_321", classes=["center", "incident"])
            central_line(model, X_210, X_321, 210, 321, incident=True)
            return promote_point_to_top(model, X_3696)


        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_3696 on the given reference triangle."""
            model = create_model('X_3696 = X_991com(EXTOUCH TRIANGLE)')
            A, B, C = construct_baseline_triangle(model, *sides, show_guides=show_guides)
            construct_x_03696(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-03696.json"))
            write_center_svg(
                model_acute,
                here / "x-03696.svg",
                subtitle="(a, b, c) = (5, 6, 7) | AB = 1",
            )