shihashi

#!/usr/bin/env python3
# -*- coding: utf-8 -*-
#
# verify20220923.py
#
# Copyright (c) 2022 shihashi
#

from collections.abc import Sequence

shihashi

\documentclass{article}% Typeset by pdfLaTeX
\usepackage{tikz}
\begin{document}
\begin{tikzpicture}
  \def\a{2}
  \def\b{3}
  \def\c{4}
  \def\B{acos((\c^2+\a^2-\b^2)/(2*\a*\c))}
  \def\r{\a*\c*sin(\B)/(\a+\b+\c)}
  \coordinate (B) at (0,0);

shihashi

\documentclass{article}% Typeset by pdfLaTeX
\usepackage{tikz}
\begin{document}
\begin{tikzpicture}
  \def\a{2}
  \def\b{3}
  \def\c{4}
  \def\B{acos((\c^2+\a^2-\b^2)/(2*\a*\c))}
  \def\R{\b/(2*sin(\B))}
  \coordinate (B) at (0,0);