\documentclass{standalone} \usepackage{amsmath,tikz} %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%% %全等符号 \newcommand{ \usimeq}{\; \begin{tikzpicture}[line width = 0.1 ex, line cap = round, shift={(1. 473ex, 1ex)}] \draw (-0.1146ex, -0.2ex) arc (330:90:0. 4ex); \draw (0.1146ex, 0.2ex) arc (150: -90:0.4ex); \draw (-0.1146ex, -0.2ex) -- (0.1146ex, 0.2ex); \draw (-0.9ex, -1.1ex) -- (0.9ex, -1.1ex); \draw [yshift = 0.35ex] (-0.9ex, -1.1ex) -- (0.9ex, -1.1ex); \end{tikzpicture}\;} %全等符号 %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%% %相似符号 \newcommand{ \usim}{\; \begin{tikzpicture}[line width = 0.1 ex, line cap = round, shift={(1. 473ex, 1ex)}] \draw (-0.1ex, -0.25ex) arc (330:90:0.5ex); \draw (0.1292ex, 0.25ex) arc (150: -90:0.5ex); \draw (-0.1ex, -0.25ex) -- (0.1292ex, 0.25ex);

\end{tikzpicture}\;} %相似符号 %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%

\begin{document} $\triangle ABC \usimeq \triangle EFG , \triangle ABC \usim \triangle EFG $ \end{document}