\documentclass[12pt]{article}
\usepackage{amsmath,amsthm,amssymb}
\usepackage{graphicx,float}
\usepackage{fancyhdr}
\pagestyle{fancy}
\fancyfoot{} % clear all footer fields
\fancyfoot[LE,RO]{\thepage} % page number in "outer" position of footer line
\usepackage{titlesec}
\newcommand{\sectionbreak}{\clearpage}
\usepackage{hyperref}
\usepackage{tkz-euclide}
\usetkzobj{all}
\DeclareMathOperator{\artanh}{artanh}
\setlength{\parskip}{1em}
\setlength{\parindent}{0em}
\theoremstyle{plain}
\newtheorem{thm}{Theorem}[section] % reset theorem numbering for each chapter
\theoremstyle{definition}
\newtheorem{defn}[thm]{Definition} % definition numbers are dependent on theorem numbers
\newtheorem{exmp}[thm]{Example} % same for example numbers
\newtheorem{rmk}[thm]{Remark}
\newtheorem{prop}[thm]{Proposition}
\newtheorem{lemma}[thm]{Lemma}
\newtheorem{cor}[thm]{Corollary}
\newtheorem*{sol}{Solution}
\newtheorem*{solution}{Solution}
\usepackage{environ}
\NewEnviron{killcontents}{}
\let\solution\killcontents
\let\endsolution\endkillcontents
\usepackage{epigraph}
\setlength\epigraphwidth{10cm}
\setlength\epigraphrule{0pt}
\usepackage{tcolorbox}
\tcbuselibrary{theorems}
\newtcbtheorem{mytheo}{}%
{colback=green!5,colframe=green!35!black,fonttitle=\bfseries}{th}
\newcommand{\question}[1]{\vspace{.1in}\noindent $\fbox{\textbf{#1}}$}
\newcommand{\forceindent}{\leavevmode{\parindent=2em\indent}}
\AtBeginDocument{\addtocontents{toc}{\protect\setlength{\parskip}{0pt}}}
\begin{document}
\begin{center}
\begin{tikzpicture}[thick]
\coordinate (O) at (0,0);
\coordinate (A) at (8,-.6);
\coordinate (B) at (2,3);
\draw (O)--(A)--(B)--cycle;
\tkzLabelSegment[below=2pt](O,A){\textit{b}}
\tkzLabelSegment[left=2pt](O,B){\textit{a}}
\tkzLabelSegment[above right=2pt](A,B){\textit{c}}
\tkzMarkAngle[fill=orange,size=0.8,opacity=.4](A,O,B)
\tkzLabelAngle[pos = 0.5](A,O,B){\textit{C}}
\tkzMarkAngle[fill= orange,size=1.2,%
opacity=.4](B,A,O)
\tkzLabelAngle[pos = 0.8](B,A,O){\textit{A}}
\tkzMarkAngle[fill= orange,size=0.8cm,%
opacity=.4](O,B,A)
\tkzLabelAngle[pos = 0.5](O,B,A){\textit{B}}
\end{tikzpicture}
\end{center}
\end{document}
我收到此代码的“尺寸太大”错误。从类似问题的答案中，我了解到我需要更改一些我使用的值。有人可以建议我应该更改哪些值以及更改多少吗？